Šaponjić, Đorđe

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orcid::0000-0001-7870-4014
  • Šaponjić, Đorđe (15)
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Author's Bibliography

Synthesis and characterization of Co-Mo bimetallic carbides

Šaponjić, Aleksandra; Šaponjić, Đorđe; Perović, Ivana M.; Vuković, Marina; Nikolić, Vladimir M.; Marčeta Kaninski, Milica; Kokunešoski, Maja

(2019)

TY  - JOUR
AU  - Šaponjić, Aleksandra
AU  - Šaponjić, Đorđe
AU  - Perović, Ivana M.
AU  - Vuković, Marina
AU  - Nikolić, Vladimir M.
AU  - Marčeta Kaninski, Milica
AU  - Kokunešoski, Maja
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8598
AB  - Co-Mo carbides were prepared by impregnation with aqueous solution of metal salts and sucrose into ordered mesoporous SBA-15 silica template using carbothermal hydrogen reduction. Bimetallic Co-Mo carbide obtained by using carbothermal hydrogen reduction of Co-Mo precursors is formed when the Co-Mo molar ratio is 1.0. The obtained samples were characterized by X-ray diffraction, scanning electron microscopy and energy dispersive X-ray analysis. Electrochemical characterization of obtained materials wеre performed by cyclic voltammetry in acid solution.
T2  - Science of Sintering
T1  - Synthesis and characterization of Co-Mo bimetallic carbides
VL  - 51
IS  - 3
SP  - 319
EP  - 326
DO  - 10.2298/SOS1903319S
ER  - 
@article{
author = "Šaponjić, Aleksandra and Šaponjić, Đorđe and Perović, Ivana M. and Vuković, Marina and Nikolić, Vladimir M. and Marčeta Kaninski, Milica and Kokunešoski, Maja",
year = "2019",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/8598",
abstract = "Co-Mo carbides were prepared by impregnation with aqueous solution of metal salts and sucrose into ordered mesoporous SBA-15 silica template using carbothermal hydrogen reduction. Bimetallic Co-Mo carbide obtained by using carbothermal hydrogen reduction of Co-Mo precursors is formed when the Co-Mo molar ratio is 1.0. The obtained samples were characterized by X-ray diffraction, scanning electron microscopy and energy dispersive X-ray analysis. Electrochemical characterization of obtained materials wеre performed by cyclic voltammetry in acid solution.",
journal = "Science of Sintering",
title = "Synthesis and characterization of Co-Mo bimetallic carbides",
volume = "51",
number = "3",
pages = "319-326",
doi = "10.2298/SOS1903319S"
}
Šaponjić, A., Šaponjić, Đ., Perović, I. M., Vuković, M., Nikolić, V. M., Marčeta Kaninski, M.,& Kokunešoski, M. (2019). Synthesis and characterization of Co-Mo bimetallic carbides.
Science of Sintering, 51(3), 319-326.
https://doi.org/10.2298/SOS1903319S
Šaponjić A, Šaponjić Đ, Perović IM, Vuković M, Nikolić VM, Marčeta Kaninski M, Kokunešoski M. Synthesis and characterization of Co-Mo bimetallic carbides. Science of Sintering. 2019;51(3):319-326
Šaponjić Aleksandra, Šaponjić Đorđe, Perović Ivana M., Vuković Marina, Nikolić Vladimir M., Marčeta Kaninski Milica, Kokunešoski Maja, "Synthesis and characterization of Co-Mo bimetallic carbides" Science of Sintering, 51, no. 3 (2019):319-326,
https://doi.org/10.2298/SOS1903319S .
1

Influence of synthesis conditions on morphological features of the SBA-15 containing only elongated and rounded/spherical grains

Kokunešoski, Maja; Baščarević, Zvezdana D.; Rakočević, Zlatko Lj.; Šaponjić, Aleksandra; Šaponjić, Đorđe; Jordanov, Dragana; Babić, Biljana M.

(2018)

TY  - JOUR
AU  - Kokunešoski, Maja
AU  - Baščarević, Zvezdana D.
AU  - Rakočević, Zlatko Lj.
AU  - Šaponjić, Aleksandra
AU  - Šaponjić, Đorđe
AU  - Jordanov, Dragana
AU  - Babić, Biljana M.
PY  - 2018
UR  - https://www.doiserbia.nb.rs/Article.aspx?ID=0350-820X1801111K
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7650
AB  - Mesoporous silica SBA-15 materials of high specific surface area (similar to 700 m(2) g(-1)) were synthesized by using block copolymer Pluronic P123 as template and tetraethoxysilane as silica source. The obtained materials were characterized by XRD, nitrogen adsorption desorption measurements, SEM, EDS and AFM analysis. It was found that small modifications of synthesis conditions influenced the morphological features of the synthesized SBA-15 samples. The SEM analysis had shown that the SBA-15 synthesized at lower temperature and longer time of reaction (80 degrees C, 48 h) provided elongated rod-shaped grains about 1 mu m long. The other sample synthesized at higher temperature and shorter time of reaction (100 degrees C, 24 h) had rounded grains and grains of regular spherical shape with diameters ranging from 0.5 to 2 mu m. The EDS analysis confirmed that the particles of both synthesized samples were of the SiO2 content. In addition, the AFM analysis had shown different surface morphologies of the materials synthesized under various conditions.
T2  - Science of Sintering
T1  - Influence of synthesis conditions on morphological features of the SBA-15 containing only elongated and rounded/spherical grains
VL  - 50
IS  - 1
SP  - 111
EP  - 121
DO  - 10.2298/SOS1801111K
ER  - 
@article{
author = "Kokunešoski, Maja and Baščarević, Zvezdana D. and Rakočević, Zlatko Lj. and Šaponjić, Aleksandra and Šaponjić, Đorđe and Jordanov, Dragana and Babić, Biljana M.",
year = "2018",
url = "https://www.doiserbia.nb.rs/Article.aspx?ID=0350-820X1801111K, http://vinar.vin.bg.ac.rs/handle/123456789/7650",
abstract = "Mesoporous silica SBA-15 materials of high specific surface area (similar to 700 m(2) g(-1)) were synthesized by using block copolymer Pluronic P123 as template and tetraethoxysilane as silica source. The obtained materials were characterized by XRD, nitrogen adsorption desorption measurements, SEM, EDS and AFM analysis. It was found that small modifications of synthesis conditions influenced the morphological features of the synthesized SBA-15 samples. The SEM analysis had shown that the SBA-15 synthesized at lower temperature and longer time of reaction (80 degrees C, 48 h) provided elongated rod-shaped grains about 1 mu m long. The other sample synthesized at higher temperature and shorter time of reaction (100 degrees C, 24 h) had rounded grains and grains of regular spherical shape with diameters ranging from 0.5 to 2 mu m. The EDS analysis confirmed that the particles of both synthesized samples were of the SiO2 content. In addition, the AFM analysis had shown different surface morphologies of the materials synthesized under various conditions.",
journal = "Science of Sintering",
title = "Influence of synthesis conditions on morphological features of the SBA-15 containing only elongated and rounded/spherical grains",
volume = "50",
number = "1",
pages = "111-121",
doi = "10.2298/SOS1801111K"
}
Kokunešoski, M., Baščarević, Z. D., Rakočević, Z. Lj., Šaponjić, A., Šaponjić, Đ., Jordanov, D.,& Babić, B. M. (2018). Influence of synthesis conditions on morphological features of the SBA-15 containing only elongated and rounded/spherical grains.
Science of Sintering, 50(1), 111-121.
https://doi.org/10.2298/SOS1801111K
Kokunešoski M, Baščarević ZD, Rakočević ZL, Šaponjić A, Šaponjić Đ, Jordanov D, Babić BM. Influence of synthesis conditions on morphological features of the SBA-15 containing only elongated and rounded/spherical grains. Science of Sintering. 2018;50(1):111-121
Kokunešoski Maja, Baščarević Zvezdana D., Rakočević Zlatko Lj., Šaponjić Aleksandra, Šaponjić Đorđe, Jordanov Dragana, Babić Biljana M., "Influence of synthesis conditions on morphological features of the SBA-15 containing only elongated and rounded/spherical grains" Science of Sintering, 50, no. 1 (2018):111-121,
https://doi.org/10.2298/SOS1801111K .
1

Iron (III) Oxide Fabrication From Natural Clay With Reference to Phase Transformation gamma- - GT alpha- Fe2O3

Šaponjić, Aleksandra; Šaponjić, Đorđe; Nikolić, Violeta N.; Milošević, Maja; Marinović-Cincović, Milena; Gyoshev, Stanislav; Vuković, Marina; Kokunešoski, Maja

(2017)

TY  - JOUR
AU  - Šaponjić, Aleksandra
AU  - Šaponjić, Đorđe
AU  - Nikolić, Violeta N.
AU  - Milošević, Maja
AU  - Marinović-Cincović, Milena
AU  - Gyoshev, Stanislav
AU  - Vuković, Marina
AU  - Kokunešoski, Maja
PY  - 2017
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1644
AB  - Amorphous iron (III) oxide was obtained from clay, using ammonium hydroxide as a precipitating agent. Influence of freeze drying under vacuum, as a drying method, on particle size, chemical composition, and crystallinity of obtained iron (III) oxide powder was investigated. After freeze drying, precipitate was annealed in air at 500 C-o and 900 oC. X-ray diffraction, particle size analysis, scanning electron microscopy, energy dispersive spectrometry, Fourier transform infrared spectroscopy, thermogravimetric and differential thermal analysis were used to characterize obtained iron (III) oxide powder. All of three powders obtained by freeze drying and annealing, have low crystallinity and particles with irregular layered shape. Narrow particle size distribution was given by an average diameter value of around 50 mu m for all observed powders. Iron-bearing materials like a-Fe2O3 and gamma-Fe2O3 are obtained. Differential thermal analysis curve of obtained samples showed endothermic reaction at 620 oC which could be ascribed to phase transition from cubic form gamma- - GT alpha- Fe2O3. Thermal transformations of iron (III) oxide, obtained from clay as a natural source, is suitable to explore in the framework of materials chemistry, and opens the possibility to synthesize materials based on Fe2O3 with specific magnetic behavior.
T2  - Science of Sintering
T1  - Iron (III) Oxide Fabrication From Natural Clay With Reference to Phase Transformation gamma- - GT alpha- Fe2O3
VL  - 49
IS  - 2
SP  - 197
EP  - 205
DO  - 10.2298/SOS1702197S
ER  - 
@article{
author = "Šaponjić, Aleksandra and Šaponjić, Đorđe and Nikolić, Violeta N. and Milošević, Maja and Marinović-Cincović, Milena and Gyoshev, Stanislav and Vuković, Marina and Kokunešoski, Maja",
year = "2017",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/1644",
abstract = "Amorphous iron (III) oxide was obtained from clay, using ammonium hydroxide as a precipitating agent. Influence of freeze drying under vacuum, as a drying method, on particle size, chemical composition, and crystallinity of obtained iron (III) oxide powder was investigated. After freeze drying, precipitate was annealed in air at 500 C-o and 900 oC. X-ray diffraction, particle size analysis, scanning electron microscopy, energy dispersive spectrometry, Fourier transform infrared spectroscopy, thermogravimetric and differential thermal analysis were used to characterize obtained iron (III) oxide powder. All of three powders obtained by freeze drying and annealing, have low crystallinity and particles with irregular layered shape. Narrow particle size distribution was given by an average diameter value of around 50 mu m for all observed powders. Iron-bearing materials like a-Fe2O3 and gamma-Fe2O3 are obtained. Differential thermal analysis curve of obtained samples showed endothermic reaction at 620 oC which could be ascribed to phase transition from cubic form gamma- - GT alpha- Fe2O3. Thermal transformations of iron (III) oxide, obtained from clay as a natural source, is suitable to explore in the framework of materials chemistry, and opens the possibility to synthesize materials based on Fe2O3 with specific magnetic behavior.",
journal = "Science of Sintering",
title = "Iron (III) Oxide Fabrication From Natural Clay With Reference to Phase Transformation gamma- - GT alpha- Fe2O3",
volume = "49",
number = "2",
pages = "197-205",
doi = "10.2298/SOS1702197S"
}
Šaponjić, A., Šaponjić, Đ., Nikolić, V. N., Milošević, M., Marinović-Cincović, M., Gyoshev, S., Vuković, M.,& Kokunešoski, M. (2017). Iron (III) Oxide Fabrication From Natural Clay With Reference to Phase Transformation gamma- - GT alpha- Fe2O3.
Science of Sintering, 49(2), 197-205.
https://doi.org/10.2298/SOS1702197S
Šaponjić A, Šaponjić Đ, Nikolić VN, Milošević M, Marinović-Cincović M, Gyoshev S, Vuković M, Kokunešoski M. Iron (III) Oxide Fabrication From Natural Clay With Reference to Phase Transformation gamma- - GT alpha- Fe2O3. Science of Sintering. 2017;49(2):197-205
Šaponjić Aleksandra, Šaponjić Đorđe, Nikolić Violeta N., Milošević Maja, Marinović-Cincović Milena, Gyoshev Stanislav, Vuković Marina, Kokunešoski Maja, "Iron (III) Oxide Fabrication From Natural Clay With Reference to Phase Transformation gamma- - GT alpha- Fe2O3" Science of Sintering, 49, no. 2 (2017):197-205,
https://doi.org/10.2298/SOS1702197S .
1
1

Cobalt-chrome activation of the nickel electrodes for the HER in alkaline water electrolysis - Part II

Marčeta Kaninski, Milica; Seović, Mina M.; Miulović, Snežana M.; Žugić, Dragana; Tasić, Gvozden S.; Šaponjić, Đorđe

(2013)

TY  - JOUR
AU  - Marčeta Kaninski, Milica
AU  - Seović, Mina M.
AU  - Miulović, Snežana M.
AU  - Žugić, Dragana
AU  - Tasić, Gvozden S.
AU  - Šaponjić, Đorđe
PY  - 2013
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/5307
AB  - Catalyst based on cobalt and chrome was investigated as cathode material for hydrogen production process via water electrolysis. Electrocatalytic efficiency of proposed system was studied using quasi-potentiostatic, galvanostatic and impedance spectroscopy techniques of the catalyst obtained by in situ electrodeposition in an alkaline, 6 M KOH, electrolyser. In accordance to our previous studies, synergetic effect of cobalt complex and chrome salt is observed, with its maximum at high temperatures and for high current densities (industrial conditions). The Tafel slopes were found to be around 120 mV and exchange current densities in the range of 10(-3) mA cm(-2) up to 10(-2) mA cm(-2). Results are presented to show the Tafel slopes, the exchange current densities, the apparent energy of activation and the apparent electrochemical surface of in situ formed Co-Cr catalyst. This study shows that catalytic performance of Co-Cr was achieved not only from the increase of the real surface area of electrodes, but also from the true catalytic effect. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
T2  - International Journal of Hydrogen Energy
T1  - Cobalt-chrome activation of the nickel electrodes for the HER in alkaline water electrolysis - Part II
VL  - 38
IS  - 4
SP  - 1758
EP  - 1764
DO  - 10.1016/j.ijhydene.2012.11.117
ER  - 
@article{
author = "Marčeta Kaninski, Milica and Seović, Mina M. and Miulović, Snežana M. and Žugić, Dragana and Tasić, Gvozden S. and Šaponjić, Đorđe",
year = "2013",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/5307",
abstract = "Catalyst based on cobalt and chrome was investigated as cathode material for hydrogen production process via water electrolysis. Electrocatalytic efficiency of proposed system was studied using quasi-potentiostatic, galvanostatic and impedance spectroscopy techniques of the catalyst obtained by in situ electrodeposition in an alkaline, 6 M KOH, electrolyser. In accordance to our previous studies, synergetic effect of cobalt complex and chrome salt is observed, with its maximum at high temperatures and for high current densities (industrial conditions). The Tafel slopes were found to be around 120 mV and exchange current densities in the range of 10(-3) mA cm(-2) up to 10(-2) mA cm(-2). Results are presented to show the Tafel slopes, the exchange current densities, the apparent energy of activation and the apparent electrochemical surface of in situ formed Co-Cr catalyst. This study shows that catalytic performance of Co-Cr was achieved not only from the increase of the real surface area of electrodes, but also from the true catalytic effect. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.",
journal = "International Journal of Hydrogen Energy",
title = "Cobalt-chrome activation of the nickel electrodes for the HER in alkaline water electrolysis - Part II",
volume = "38",
number = "4",
pages = "1758-1764",
doi = "10.1016/j.ijhydene.2012.11.117"
}
Marčeta Kaninski, M., Seović, M. M., Miulović, S. M., Žugić, D., Tasić, G. S.,& Šaponjić, Đ. (2013). Cobalt-chrome activation of the nickel electrodes for the HER in alkaline water electrolysis - Part II.
International Journal of Hydrogen Energy, 38(4), 1758-1764.
https://doi.org/10.1016/j.ijhydene.2012.11.117
Marčeta Kaninski M, Seović MM, Miulović SM, Žugić D, Tasić GS, Šaponjić Đ. Cobalt-chrome activation of the nickel electrodes for the HER in alkaline water electrolysis - Part II. International Journal of Hydrogen Energy. 2013;38(4):1758-1764
Marčeta Kaninski Milica, Seović Mina M., Miulović Snežana M., Žugić Dragana, Tasić Gvozden S., Šaponjić Đorđe, "Cobalt-chrome activation of the nickel electrodes for the HER in alkaline water electrolysis - Part II" International Journal of Hydrogen Energy, 38, no. 4 (2013):1758-1764,
https://doi.org/10.1016/j.ijhydene.2012.11.117 .
10
8
10

Energy consumption and stability of the Ni-Mo electrodes for the alkaline hydrogen production at industrial conditions

Marčeta Kaninski, Milica; Šaponjić, Đorđe; Nikolić, Vladimir M.; Žugić, Dragana; Tasić, Gvozden S.

(2011)

TY  - JOUR
AU  - Marčeta Kaninski, Milica
AU  - Šaponjić, Đorđe
AU  - Nikolić, Vladimir M.
AU  - Žugić, Dragana
AU  - Tasić, Gvozden S.
PY  - 2011
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/4420
AB  - Hydrogen production via electrolysis of water from alkaline aqueous electrolytes is a well-established conventional technology. However, the cost of hydrogen produced in such a way is high. To improve this process we have investigated in situ activation with Ni-Mo electrocatalytic material for electrodes. This two d-metal combination possesses one of the highest known activities for the HER. Ni-Mo based catalyst was not applied at industrial applications yet, because under industrial conditions (high temperature and concentrated alkaline solution), permanent destruction of the Ni-Mo alloy coating occurs. The most important result of this study is that the Ni-Mo deposit obtained by in situ activation, under industrial conditions, exhibit long term stability and the electrodes retain their high catalytic performance. The process of adding Ni-Mo activating compounds in situ exhibits savings of the energy consumption that can go beyond 20% in some cases. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
T2  - International Journal of Hydrogen Energy
T1  - Energy consumption and stability of the Ni-Mo electrodes for the alkaline hydrogen production at industrial conditions
VL  - 36
IS  - 15
SP  - 8864
EP  - 8868
DO  - 10.1016/j.ijhydene.2011.04.144
ER  - 
@article{
author = "Marčeta Kaninski, Milica and Šaponjić, Đorđe and Nikolić, Vladimir M. and Žugić, Dragana and Tasić, Gvozden S.",
year = "2011",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/4420",
abstract = "Hydrogen production via electrolysis of water from alkaline aqueous electrolytes is a well-established conventional technology. However, the cost of hydrogen produced in such a way is high. To improve this process we have investigated in situ activation with Ni-Mo electrocatalytic material for electrodes. This two d-metal combination possesses one of the highest known activities for the HER. Ni-Mo based catalyst was not applied at industrial applications yet, because under industrial conditions (high temperature and concentrated alkaline solution), permanent destruction of the Ni-Mo alloy coating occurs. The most important result of this study is that the Ni-Mo deposit obtained by in situ activation, under industrial conditions, exhibit long term stability and the electrodes retain their high catalytic performance. The process of adding Ni-Mo activating compounds in situ exhibits savings of the energy consumption that can go beyond 20% in some cases. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.",
journal = "International Journal of Hydrogen Energy",
title = "Energy consumption and stability of the Ni-Mo electrodes for the alkaline hydrogen production at industrial conditions",
volume = "36",
number = "15",
pages = "8864-8868",
doi = "10.1016/j.ijhydene.2011.04.144"
}
Marčeta Kaninski, M., Šaponjić, Đ., Nikolić, V. M., Žugić, D.,& Tasić, G. S. (2011). Energy consumption and stability of the Ni-Mo electrodes for the alkaline hydrogen production at industrial conditions.
International Journal of Hydrogen Energy, 36(15), 8864-8868.
https://doi.org/10.1016/j.ijhydene.2011.04.144
Marčeta Kaninski M, Šaponjić Đ, Nikolić VM, Žugić D, Tasić GS. Energy consumption and stability of the Ni-Mo electrodes for the alkaline hydrogen production at industrial conditions. International Journal of Hydrogen Energy. 2011;36(15):8864-8868
Marčeta Kaninski Milica, Šaponjić Đorđe, Nikolić Vladimir M., Žugić Dragana, Tasić Gvozden S., "Energy consumption and stability of the Ni-Mo electrodes for the alkaline hydrogen production at industrial conditions" International Journal of Hydrogen Energy, 36, no. 15 (2011):8864-8868,
https://doi.org/10.1016/j.ijhydene.2011.04.144 .
22
22
24

Performance comparison of modified poly(vinyl alcohol) based membranes in alkaline fuel cells

Nikolić, Vladimir M.; Žugić, Dragana; Maksić, Aleksandar; Šaponjić, Đorđe; Marčeta Kaninski, Milica

(2011)

TY  - JOUR
AU  - Nikolić, Vladimir M.
AU  - Žugić, Dragana
AU  - Maksić, Aleksandar
AU  - Šaponjić, Đorđe
AU  - Marčeta Kaninski, Milica
PY  - 2011
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/4498
AB  - There are several problems which are holding back the use of fuel cells. The utilization of fuel cells depends on the start-up costs which are very high due to the use of expensive materials for their construction. In that respect, we describe a cost-effective alkaline fuel cell (AFC) that uses solid, polymer based, membrane instead of conventionaly used, highly concentrated, corrosive, liquid alkaline electrolyte. This approach to AFC is potentially the basis of a simple, low-cost system, that can solve one of the problems of the highly-efficient and environment-friendly AFC. The focus of this paper are low cost composite alkaline membranes, based on poly(vinyl alcohol) (PVA). The PVA matrix is made by solution cast method and gamma irradiation crosslinking. Three different types of membranes are obtained in this manner plain PVA membrane, PVA membrane cross-linked using gamma irradiation (gamma-PVA) and composite PVA membrane doped with Mo (PVA-Mo). These membranes are immersed in the alkaline solution and investigated as anion exchange membranes. The performance of the solid alkaline fuel cells (SAFCs) containing these PVA membranes has been studied under hydrogen and oxygen gas flow on the Pt/C catalyst. Both, gamma-PVA and PVA-Mo membranes are modified to absorb larger amounts of alkaline solution than the PVA membrane, thus greatly improving the performance of the SAFC, in terms of output power. This is clearly indicated in the polarisation curves. The electrochemical impedance spectroscopy measurements during the SAFC operation were also performed to give better insight in the effect observed. Investigation presented in this paper clearly indicates that solid alkaline PVA membranes can be used for the construction of the SAFCs. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
T2  - International Journal of Hydrogen Energy
T1  - Performance comparison of modified poly(vinyl alcohol) based membranes in alkaline fuel cells
VL  - 36
IS  - 17
SP  - 11004
EP  - 11010
DO  - 10.1016/j.ijhydene.2011.05.164
ER  - 
@article{
author = "Nikolić, Vladimir M. and Žugić, Dragana and Maksić, Aleksandar and Šaponjić, Đorđe and Marčeta Kaninski, Milica",
year = "2011",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/4498",
abstract = "There are several problems which are holding back the use of fuel cells. The utilization of fuel cells depends on the start-up costs which are very high due to the use of expensive materials for their construction. In that respect, we describe a cost-effective alkaline fuel cell (AFC) that uses solid, polymer based, membrane instead of conventionaly used, highly concentrated, corrosive, liquid alkaline electrolyte. This approach to AFC is potentially the basis of a simple, low-cost system, that can solve one of the problems of the highly-efficient and environment-friendly AFC. The focus of this paper are low cost composite alkaline membranes, based on poly(vinyl alcohol) (PVA). The PVA matrix is made by solution cast method and gamma irradiation crosslinking. Three different types of membranes are obtained in this manner plain PVA membrane, PVA membrane cross-linked using gamma irradiation (gamma-PVA) and composite PVA membrane doped with Mo (PVA-Mo). These membranes are immersed in the alkaline solution and investigated as anion exchange membranes. The performance of the solid alkaline fuel cells (SAFCs) containing these PVA membranes has been studied under hydrogen and oxygen gas flow on the Pt/C catalyst. Both, gamma-PVA and PVA-Mo membranes are modified to absorb larger amounts of alkaline solution than the PVA membrane, thus greatly improving the performance of the SAFC, in terms of output power. This is clearly indicated in the polarisation curves. The electrochemical impedance spectroscopy measurements during the SAFC operation were also performed to give better insight in the effect observed. Investigation presented in this paper clearly indicates that solid alkaline PVA membranes can be used for the construction of the SAFCs. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.",
journal = "International Journal of Hydrogen Energy",
title = "Performance comparison of modified poly(vinyl alcohol) based membranes in alkaline fuel cells",
volume = "36",
number = "17",
pages = "11004-11010",
doi = "10.1016/j.ijhydene.2011.05.164"
}
Nikolić, V. M., Žugić, D., Maksić, A., Šaponjić, Đ.,& Marčeta Kaninski, M. (2011). Performance comparison of modified poly(vinyl alcohol) based membranes in alkaline fuel cells.
International Journal of Hydrogen Energy, 36(17), 11004-11010.
https://doi.org/10.1016/j.ijhydene.2011.05.164
Nikolić VM, Žugić D, Maksić A, Šaponjić Đ, Marčeta Kaninski M. Performance comparison of modified poly(vinyl alcohol) based membranes in alkaline fuel cells. International Journal of Hydrogen Energy. 2011;36(17):11004-11010
Nikolić Vladimir M., Žugić Dragana, Maksić Aleksandar, Šaponjić Đorđe, Marčeta Kaninski Milica, "Performance comparison of modified poly(vinyl alcohol) based membranes in alkaline fuel cells" International Journal of Hydrogen Energy, 36, no. 17 (2011):11004-11010,
https://doi.org/10.1016/j.ijhydene.2011.05.164 .
20
15
18

Electrochemical characterization of the Ni-W catalyst formed in situ during alkaline electrolytic hydrogen production-Part II

Marčeta Kaninski, Milica; Šaponjić, Đorđe; Perović, Ivana M.; Maksić, Aleksandar; Nikolić, Vladimir M.

(2011)

TY  - JOUR
AU  - Marčeta Kaninski, Milica
AU  - Šaponjić, Đorđe
AU  - Perović, Ivana M.
AU  - Maksić, Aleksandar
AU  - Nikolić, Vladimir M.
PY  - 2011
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/4523
AB  - Objective of this work was to investigate the electrocatalytic efficiency using quasi-potentiostatic, galvanostatic and impedance spectroscopy techniques of the Ni-W catalysts obtained by in situ electrodeposition in an alkaline, GM KOH, electrolyser. Synergetic effect is observed, with its maximum at industrial conditions (high temperature and current density). The Tafel slopes are similar to 120 mV and exchange current densities are in the range of 10(-4) mA cm(-2). Results are presented to show the Tafel slopes, the exchange current densities, the apparent energy of activation and the apparent electrochemical surface of the in situ formed Ni-W catalyst. Obtained results could have significant impact on the industrial process for the alkaline hydrogen production and suggest to good catalytic performance not only from the increase of the real surface area of the electrodes, but also from the true catalytic effect. (C) 2011 Elsevier B.V. All rights reserved.
T2  - Applied Catalysis. A: General
T1  - Electrochemical characterization of the Ni-W catalyst formed in situ during alkaline electrolytic hydrogen production-Part II
VL  - 405
IS  - 1-2
SP  - 29
EP  - 35
DO  - 10.1016/j.apcata.2011.07.015
ER  - 
@article{
author = "Marčeta Kaninski, Milica and Šaponjić, Đorđe and Perović, Ivana M. and Maksić, Aleksandar and Nikolić, Vladimir M.",
year = "2011",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/4523",
abstract = "Objective of this work was to investigate the electrocatalytic efficiency using quasi-potentiostatic, galvanostatic and impedance spectroscopy techniques of the Ni-W catalysts obtained by in situ electrodeposition in an alkaline, GM KOH, electrolyser. Synergetic effect is observed, with its maximum at industrial conditions (high temperature and current density). The Tafel slopes are similar to 120 mV and exchange current densities are in the range of 10(-4) mA cm(-2). Results are presented to show the Tafel slopes, the exchange current densities, the apparent energy of activation and the apparent electrochemical surface of the in situ formed Ni-W catalyst. Obtained results could have significant impact on the industrial process for the alkaline hydrogen production and suggest to good catalytic performance not only from the increase of the real surface area of the electrodes, but also from the true catalytic effect. (C) 2011 Elsevier B.V. All rights reserved.",
journal = "Applied Catalysis. A: General",
title = "Electrochemical characterization of the Ni-W catalyst formed in situ during alkaline electrolytic hydrogen production-Part II",
volume = "405",
number = "1-2",
pages = "29-35",
doi = "10.1016/j.apcata.2011.07.015"
}
Marčeta Kaninski, M., Šaponjić, Đ., Perović, I. M., Maksić, A.,& Nikolić, V. M. (2011). Electrochemical characterization of the Ni-W catalyst formed in situ during alkaline electrolytic hydrogen production-Part II.
Applied Catalysis. A: General, 405(1-2), 29-35.
https://doi.org/10.1016/j.apcata.2011.07.015
Marčeta Kaninski M, Šaponjić Đ, Perović IM, Maksić A, Nikolić VM. Electrochemical characterization of the Ni-W catalyst formed in situ during alkaline electrolytic hydrogen production-Part II. Applied Catalysis. A: General. 2011;405(1-2):29-35
Marčeta Kaninski Milica, Šaponjić Đorđe, Perović Ivana M., Maksić Aleksandar, Nikolić Vladimir M., "Electrochemical characterization of the Ni-W catalyst formed in situ during alkaline electrolytic hydrogen production-Part II" Applied Catalysis. A: General, 405, no. 1-2 (2011):29-35,
https://doi.org/10.1016/j.apcata.2011.07.015 .
16
15
16

Raising efficiency of hydrogen generation from alkaline water electrolysis - Energy saving

Nikolić, Vladimir M.; Tasić, Gvozden S.; Maksić, Aleksandar; Šaponjić, Đorđe; Miulović, Snežana M.; Marčeta Kaninski, Milica

(2010)

TY  - JOUR
AU  - Nikolić, Vladimir M.
AU  - Tasić, Gvozden S.
AU  - Maksić, Aleksandar
AU  - Šaponjić, Đorđe
AU  - Miulović, Snežana M.
AU  - Marčeta Kaninski, Milica
PY  - 2010
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/4148
AB  - This paper presents an attempt to make the alkaline electrolytic production of hydrogen more efficient by adding in situ activating compounds in ionic and complex form Cobalt and tungsten based ionic activators (i a) added directly into the electrolyte during the electrolytic process reduce energy requirements per mass unit of hydrogen produced for about 15% compared to non activated system for a number of current densities in a wide temperature range Energy saving is higher at higher temperatures and on higher current densities Structural and morphological characteristic of deposit formed on the cathode during the electrolytic process reveal very interesting and unique pattern with highly developed surface area and uniform distribution of the pores Obtained deposit also exhibit a long term stability (C) 2010 Professor T Nejat Veziroglu Published by Elsevier Ltd All rights reserved
T2  - International Journal of Hydrogen Energy
T1  - Raising efficiency of hydrogen generation from alkaline water electrolysis - Energy saving
VL  - 35
IS  - 22
SP  - 12369
EP  - 12373
DO  - 10.1016/j.ijhydene.2010.08.069
ER  - 
@article{
author = "Nikolić, Vladimir M. and Tasić, Gvozden S. and Maksić, Aleksandar and Šaponjić, Đorđe and Miulović, Snežana M. and Marčeta Kaninski, Milica",
year = "2010",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/4148",
abstract = "This paper presents an attempt to make the alkaline electrolytic production of hydrogen more efficient by adding in situ activating compounds in ionic and complex form Cobalt and tungsten based ionic activators (i a) added directly into the electrolyte during the electrolytic process reduce energy requirements per mass unit of hydrogen produced for about 15% compared to non activated system for a number of current densities in a wide temperature range Energy saving is higher at higher temperatures and on higher current densities Structural and morphological characteristic of deposit formed on the cathode during the electrolytic process reveal very interesting and unique pattern with highly developed surface area and uniform distribution of the pores Obtained deposit also exhibit a long term stability (C) 2010 Professor T Nejat Veziroglu Published by Elsevier Ltd All rights reserved",
journal = "International Journal of Hydrogen Energy",
title = "Raising efficiency of hydrogen generation from alkaline water electrolysis - Energy saving",
volume = "35",
number = "22",
pages = "12369-12373",
doi = "10.1016/j.ijhydene.2010.08.069"
}
Nikolić, V. M., Tasić, G. S., Maksić, A., Šaponjić, Đ., Miulović, S. M.,& Marčeta Kaninski, M. (2010). Raising efficiency of hydrogen generation from alkaline water electrolysis - Energy saving.
International Journal of Hydrogen Energy, 35(22), 12369-12373.
https://doi.org/10.1016/j.ijhydene.2010.08.069
Nikolić VM, Tasić GS, Maksić A, Šaponjić Đ, Miulović SM, Marčeta Kaninski M. Raising efficiency of hydrogen generation from alkaline water electrolysis - Energy saving. International Journal of Hydrogen Energy. 2010;35(22):12369-12373
Nikolić Vladimir M., Tasić Gvozden S., Maksić Aleksandar, Šaponjić Đorđe, Miulović Snežana M., Marčeta Kaninski Milica, "Raising efficiency of hydrogen generation from alkaline water electrolysis - Energy saving" International Journal of Hydrogen Energy, 35, no. 22 (2010):12369-12373,
https://doi.org/10.1016/j.ijhydene.2010.08.069 .
77
70
73

Non-noble metal catalyst for a future Pt free PEMFC

Tasić, Gvozden S.; Miljanic, Scepan S.; Marčeta Kaninski, Milica; Šaponjić, Đorđe; Nikolić, Vladimir M.

(2009)

TY  - JOUR
AU  - Tasić, Gvozden S.
AU  - Miljanic, Scepan S.
AU  - Marčeta Kaninski, Milica
AU  - Šaponjić, Đorđe
AU  - Nikolić, Vladimir M.
PY  - 2009
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/3832
AB  - We have investigated the possibility of developing high-performance, cost-effective and durable non-noble Co metal electrocatalyst for PEMFC. In this work we applied electrodeposition process for PEMFC electrode preparation that is very efficient and far simpler than any other investigated method. The fuel cell with electrodeposited Co as anode catalyst has shown satisfying performance level. In determining FCs operating conditions, subsequent electrochemical impedance and output power measurements were done, which enable the insight into the Co catalyst based anode behavior. Structure analysis of the electrodeposited anode layer was done by means of SEM and EDS technique. Although the Pt catalyst has higher efficiency, its cost performance ratio is significantly lower than for the Co catalyst, thus this investigation gives interesting possibilities in area of stationary fuel cell application. (C) 2009 Elsevier B.V. All rights reserved.
T2  - Electrochemistry Communications
T1  - Non-noble metal catalyst for a future Pt free PEMFC
VL  - 11
IS  - 11
SP  - 2097
EP  - 2100
DO  - 10.1016/j.elecom.2009.09.003
ER  - 
@article{
author = "Tasić, Gvozden S. and Miljanic, Scepan S. and Marčeta Kaninski, Milica and Šaponjić, Đorđe and Nikolić, Vladimir M.",
year = "2009",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/3832",
abstract = "We have investigated the possibility of developing high-performance, cost-effective and durable non-noble Co metal electrocatalyst for PEMFC. In this work we applied electrodeposition process for PEMFC electrode preparation that is very efficient and far simpler than any other investigated method. The fuel cell with electrodeposited Co as anode catalyst has shown satisfying performance level. In determining FCs operating conditions, subsequent electrochemical impedance and output power measurements were done, which enable the insight into the Co catalyst based anode behavior. Structure analysis of the electrodeposited anode layer was done by means of SEM and EDS technique. Although the Pt catalyst has higher efficiency, its cost performance ratio is significantly lower than for the Co catalyst, thus this investigation gives interesting possibilities in area of stationary fuel cell application. (C) 2009 Elsevier B.V. All rights reserved.",
journal = "Electrochemistry Communications",
title = "Non-noble metal catalyst for a future Pt free PEMFC",
volume = "11",
number = "11",
pages = "2097-2100",
doi = "10.1016/j.elecom.2009.09.003"
}
Tasić, G. S., Miljanic, S. S., Marčeta Kaninski, M., Šaponjić, Đ.,& Nikolić, V. M. (2009). Non-noble metal catalyst for a future Pt free PEMFC.
Electrochemistry Communications, 11(11), 2097-2100.
https://doi.org/10.1016/j.elecom.2009.09.003
Tasić GS, Miljanic SS, Marčeta Kaninski M, Šaponjić Đ, Nikolić VM. Non-noble metal catalyst for a future Pt free PEMFC. Electrochemistry Communications. 2009;11(11):2097-2100
Tasić Gvozden S., Miljanic Scepan S., Marčeta Kaninski Milica, Šaponjić Đorđe, Nikolić Vladimir M., "Non-noble metal catalyst for a future Pt free PEMFC" Electrochemistry Communications, 11, no. 11 (2009):2097-2100,
https://doi.org/10.1016/j.elecom.2009.09.003 .
22
21
24

Realization of a Digital Rate Meter as An Iir Digital Filter By Implementing An Optimized Signal Processing Algorithm

Šaponjić, Đorđe; Arandjelovic, Vojislav

(2009)

TY  - JOUR
AU  - Šaponjić, Đorđe
AU  - Arandjelovic, Vojislav
PY  - 2009
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/3250
AB  - By applying the well known dualism: mean count rate - mean time between successive pulses - the equivalence between an IIR digital filter and a preset count digital rate meter has been demonstrated. By using a bank of four second order IIR filters and an optimized automated algorithm for filter selection, a practical realization of a preset count rate meter giving good tradeoff between statistical fluctuations and speed of response, particularly at low count rates such as background monitoring, is presented. The presented solution is suitable for designing portable count rate meters. The designed prototype is capable of operating up to 3600 pulses per second with an accuracy of over 4% in steady-state and responce times of 1 second for the rising edge and 2 seconds for the falling edge of the mean count rate step-change.
T2  - Nuclear technology and radiation protection
T1  - Realization of a Digital Rate Meter as An Iir Digital Filter By Implementing An Optimized Signal Processing Algorithm
VL  - 24
IS  - 2
SP  - 126
EP  - 131
DO  - 10.2298/NTRP0902126S
ER  - 
@article{
author = "Šaponjić, Đorđe and Arandjelovic, Vojislav",
year = "2009",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/3250",
abstract = "By applying the well known dualism: mean count rate - mean time between successive pulses - the equivalence between an IIR digital filter and a preset count digital rate meter has been demonstrated. By using a bank of four second order IIR filters and an optimized automated algorithm for filter selection, a practical realization of a preset count rate meter giving good tradeoff between statistical fluctuations and speed of response, particularly at low count rates such as background monitoring, is presented. The presented solution is suitable for designing portable count rate meters. The designed prototype is capable of operating up to 3600 pulses per second with an accuracy of over 4% in steady-state and responce times of 1 second for the rising edge and 2 seconds for the falling edge of the mean count rate step-change.",
journal = "Nuclear technology and radiation protection",
title = "Realization of a Digital Rate Meter as An Iir Digital Filter By Implementing An Optimized Signal Processing Algorithm",
volume = "24",
number = "2",
pages = "126-131",
doi = "10.2298/NTRP0902126S"
}
Šaponjić, Đ.,& Arandjelovic, V. (2009). Realization of a Digital Rate Meter as An Iir Digital Filter By Implementing An Optimized Signal Processing Algorithm.
Nuclear technology and radiation protection, 24(2), 126-131.
https://doi.org/10.2298/NTRP0902126S
Šaponjić Đ, Arandjelovic V. Realization of a Digital Rate Meter as An Iir Digital Filter By Implementing An Optimized Signal Processing Algorithm. Nuclear technology and radiation protection. 2009;24(2):126-131
Šaponjić Đorđe, Arandjelovic Vojislav, "Realization of a Digital Rate Meter as An Iir Digital Filter By Implementing An Optimized Signal Processing Algorithm" Nuclear technology and radiation protection, 24, no. 2 (2009):126-131,
https://doi.org/10.2298/NTRP0902126S .

Comparison of different electrode materials - Energy requirements in the electrolytic hydrogen evolution process

Marčeta Kaninski, Milica; Stojić, Dragica Lj.; Šaponjić, Đorđe; Potkonjak, Nebojša I.; Miljanic, SS

(2006)

TY  - JOUR
AU  - Marčeta Kaninski, Milica
AU  - Stojić, Dragica Lj.
AU  - Šaponjić, Đorđe
AU  - Potkonjak, Nebojša I.
AU  - Miljanic, SS
PY  - 2006
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/6588
AB  - Hydrogen is one of the most widely produced commodities in the world economy. The basic technologies for producing hydrogen via the electrolysis of water have long been known. However, there are disadvantages when using this process. Two-thirds of the operation costs of the electrolyzers are electricity costs. The challenge, addressed.by numerous companies and researchers in the last few years, is the cost cutting by increasing efficiency of the process. The aim of this work was the attempt to optimize the electrolytic hydrogen production from alkaline solution, through the variation of cathode materials and use of ionic activators. The part of our results shows the better electrocatalytic activity of intermetallic phases and the energy consumption is decreased when compared with the industrial data (4.5-5 kWh m(-3) H-2). The role of ionic activator used is also very significant. These results give the opportunity for further research of cumulative effect of the intermetallic electrodes and ionic activators on industrial level. (c) 2005 Elsevier B.V. All rights reserved.
T2  - Journal of Power Sources
T1  - Comparison of different electrode materials - Energy requirements in the electrolytic hydrogen evolution process
VL  - 157
IS  - 2
SP  - 758
EP  - 764
DO  - 10.1016/j.jpowsour.2005.10.105
ER  - 
@article{
author = "Marčeta Kaninski, Milica and Stojić, Dragica Lj. and Šaponjić, Đorđe and Potkonjak, Nebojša I. and Miljanic, SS",
year = "2006",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/6588",
abstract = "Hydrogen is one of the most widely produced commodities in the world economy. The basic technologies for producing hydrogen via the electrolysis of water have long been known. However, there are disadvantages when using this process. Two-thirds of the operation costs of the electrolyzers are electricity costs. The challenge, addressed.by numerous companies and researchers in the last few years, is the cost cutting by increasing efficiency of the process. The aim of this work was the attempt to optimize the electrolytic hydrogen production from alkaline solution, through the variation of cathode materials and use of ionic activators. The part of our results shows the better electrocatalytic activity of intermetallic phases and the energy consumption is decreased when compared with the industrial data (4.5-5 kWh m(-3) H-2). The role of ionic activator used is also very significant. These results give the opportunity for further research of cumulative effect of the intermetallic electrodes and ionic activators on industrial level. (c) 2005 Elsevier B.V. All rights reserved.",
journal = "Journal of Power Sources",
title = "Comparison of different electrode materials - Energy requirements in the electrolytic hydrogen evolution process",
volume = "157",
number = "2",
pages = "758-764",
doi = "10.1016/j.jpowsour.2005.10.105"
}
Marčeta Kaninski, M., Stojić, D. Lj., Šaponjić, Đ., Potkonjak, N. I.,& Miljanic, S. (2006). Comparison of different electrode materials - Energy requirements in the electrolytic hydrogen evolution process.
Journal of Power Sources, 157(2), 758-764.
https://doi.org/10.1016/j.jpowsour.2005.10.105
Marčeta Kaninski M, Stojić DL, Šaponjić Đ, Potkonjak NI, Miljanic S. Comparison of different electrode materials - Energy requirements in the electrolytic hydrogen evolution process. Journal of Power Sources. 2006;157(2):758-764
Marčeta Kaninski Milica, Stojić Dragica Lj., Šaponjić Đorđe, Potkonjak Nebojša I., Miljanic SS, "Comparison of different electrode materials - Energy requirements in the electrolytic hydrogen evolution process" Journal of Power Sources, 157, no. 2 (2006):758-764,
https://doi.org/10.1016/j.jpowsour.2005.10.105 .
26
25
28

Digitalno upravljanje bankom rekurzivnih filtara u optimizaciji obrade signala sa impulsnih detektora zračenja u nuklearnoj instrumentaciji

Šaponjić, Đorđe

(Univerzitet u Beogradu, Elektrotehnički fakultet, 2006)

TY  - BOOK
AU  - Šaponjić, Đorđe
PY  - 2006
UR  - http://www.vbs.rs/scripts/cobiss?command=DISPLAY&base=99999&rid=34198031&fmt=11&lani=sc
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7607
AB  - New algorithm for measurement of mean count rate of pulses from radiation detectors is described. The algorithm is based on the control of a bank of digital IIR filters governed by the state of mean count rate - stationary or transient. The algorithm solves successfully the compromise between the contradictory requirements for low statistical fluctuations in steady state and fast response to sudden changes of mean count rate. The design of the bank of IIR filters is carried out by using the Chebyshev approximation of the second kind in order to achieve the high selectivity and high stop-band attenuation applying as low as possible order of the constituent filters. All designed filters are of the second order.
The static and dynamic characteristics of the new algorithm and the corresponding computational efficiency are tested and compared with those of the traditional rate-meter algorithms. The responses of the algorithm to linearly growing mean count rate and its sensitivity to variations of mean count rate have also been examined. The state of mean count rate, stationary or transient, is determined by a circuit for estimation of the gradient of mean count rate.
The numbers of threshold levels within the adaptation logic circuit and their mutual positions have been optimized to achieve the best compromise.
Stability of the algorithm is tested numerically by computer simulations and verified experimentally.
A mean count rate meter based on the described algorithm has been designed and successfully realized.
PB  - Univerzitet u Beogradu, Elektrotehnički fakultet
T1  - Digitalno upravljanje bankom rekurzivnih filtara u optimizaciji obrade signala sa impulsnih detektora zračenja u nuklearnoj instrumentaciji
T1  - Digital Control of a Bank of Recursive Filters in Optimal Processing of Signals from Pulse Radiation Detectors in Nuclear Instrumentation
T1  - Цифровое управление банкой рекурзивных филътеров в оптималъной обработки сигналов от импулъсных радиационных детекторов в ядерной инструментации
ER  - 
@phdthesis{
author = "Šaponjić, Đorđe",
year = "2006",
url = "http://www.vbs.rs/scripts/cobiss?command=DISPLAY&base=99999&rid=34198031&fmt=11&lani=sc, http://vinar.vin.bg.ac.rs/handle/123456789/7607",
abstract = "New algorithm for measurement of mean count rate of pulses from radiation detectors is described. The algorithm is based on the control of a bank of digital IIR filters governed by the state of mean count rate - stationary or transient. The algorithm solves successfully the compromise between the contradictory requirements for low statistical fluctuations in steady state and fast response to sudden changes of mean count rate. The design of the bank of IIR filters is carried out by using the Chebyshev approximation of the second kind in order to achieve the high selectivity and high stop-band attenuation applying as low as possible order of the constituent filters. All designed filters are of the second order.
The static and dynamic characteristics of the new algorithm and the corresponding computational efficiency are tested and compared with those of the traditional rate-meter algorithms. The responses of the algorithm to linearly growing mean count rate and its sensitivity to variations of mean count rate have also been examined. The state of mean count rate, stationary or transient, is determined by a circuit for estimation of the gradient of mean count rate.
The numbers of threshold levels within the adaptation logic circuit and their mutual positions have been optimized to achieve the best compromise.
Stability of the algorithm is tested numerically by computer simulations and verified experimentally.
A mean count rate meter based on the described algorithm has been designed and successfully realized.",
publisher = "Univerzitet u Beogradu, Elektrotehnički fakultet",
title = "Digitalno upravljanje bankom rekurzivnih filtara u optimizaciji obrade signala sa impulsnih detektora zračenja u nuklearnoj instrumentaciji, Digital Control of a Bank of Recursive Filters in Optimal Processing of Signals from Pulse Radiation Detectors in Nuclear Instrumentation, Цифровое управление банкой рекурзивных филътеров в оптималъной обработки сигналов от импулъсных радиационных детекторов в ядерной инструментации"
}
Šaponjić, Đ. (2006). Цифровое управление банкой рекурзивных филътеров в оптималъной обработки сигналов от импулъсных радиационных детекторов в ядерной инструментации.

Univerzitet u Beogradu, Elektrotehnički fakultet..
Šaponjić Đ. Цифровое управление банкой рекурзивных филътеров в оптималъной обработки сигналов от импулъсных радиационных детекторов в ядерной инструментации. 2006;
Šaponjić Đorđe, "Цифровое управление банкой рекурзивных филътеров в оптималъной обработки сигналов от импулъсных радиационных детекторов в ядерной инструментации" (2006)

Digital control of a bank of IIR filters in optimal processing of signals from pulse radiation detectors

Šaponjić, Đorđe; Arandjelovic, Vojislav; Stojic, Milic

(2006)

TY  - JOUR
AU  - Šaponjić, Đorđe
AU  - Arandjelovic, Vojislav
AU  - Stojic, Milic
PY  - 2006
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/3134
AB  - New algorithm for measurement of mean count rate of pulses from radiation detectors is described. The algorithm is based on the control of a bank of digital IIR filters governed by the state of mean count rate-stationary or transient. The algorithm solves successfully the compromise between the contradictory requirements for low statistical fluctuations in steady state and fast response to sudden changes of mean count rate. The design of the bank of IIR filters is carried out by using the Chebyshev approximation of the second kind in order to achieve the high selectivity and high stopband attenuation applying as low as possible order of the constituent filters. All designed filters are of the second order. The static and dynamic characteristics of the new algorithm and the corresponding computational efficiency are tested and compared with those of the traditional ratemeter algorithms. The state of mean count rate, stationary or transient, is determined by a circuit for estimation of the gradient of mean count rate. The numbers of threshold levels within the adaptation logic circuit and their mutual positions have been optimized to achieve the best compromise.
T2  - IEEE Transactions on Nuclear Science
T1  - Digital control of a bank of IIR filters in optimal processing of signals from pulse radiation detectors
VL  - 53
IS  - 6
SP  - 3855
EP  - 3864
DO  - 10.1109/TNS.2006.883837
ER  - 
@article{
author = "Šaponjić, Đorđe and Arandjelovic, Vojislav and Stojic, Milic",
year = "2006",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/3134",
abstract = "New algorithm for measurement of mean count rate of pulses from radiation detectors is described. The algorithm is based on the control of a bank of digital IIR filters governed by the state of mean count rate-stationary or transient. The algorithm solves successfully the compromise between the contradictory requirements for low statistical fluctuations in steady state and fast response to sudden changes of mean count rate. The design of the bank of IIR filters is carried out by using the Chebyshev approximation of the second kind in order to achieve the high selectivity and high stopband attenuation applying as low as possible order of the constituent filters. All designed filters are of the second order. The static and dynamic characteristics of the new algorithm and the corresponding computational efficiency are tested and compared with those of the traditional ratemeter algorithms. The state of mean count rate, stationary or transient, is determined by a circuit for estimation of the gradient of mean count rate. The numbers of threshold levels within the adaptation logic circuit and their mutual positions have been optimized to achieve the best compromise.",
journal = "IEEE Transactions on Nuclear Science",
title = "Digital control of a bank of IIR filters in optimal processing of signals from pulse radiation detectors",
volume = "53",
number = "6",
pages = "3855-3864",
doi = "10.1109/TNS.2006.883837"
}
Šaponjić, Đ., Arandjelovic, V.,& Stojic, M. (2006). Digital control of a bank of IIR filters in optimal processing of signals from pulse radiation detectors.
IEEE Transactions on Nuclear Science, 53(6), 3855-3864.
https://doi.org/10.1109/TNS.2006.883837
Šaponjić Đ, Arandjelovic V, Stojic M. Digital control of a bank of IIR filters in optimal processing of signals from pulse radiation detectors. IEEE Transactions on Nuclear Science. 2006;53(6):3855-3864
Šaponjić Đorđe, Arandjelovic Vojislav, Stojic Milic, "Digital control of a bank of IIR filters in optimal processing of signals from pulse radiation detectors" IEEE Transactions on Nuclear Science, 53, no. 6 (2006):3855-3864,
https://doi.org/10.1109/TNS.2006.883837 .
1
1
1

Digital control of a bank of IIR filters in optimal processing of signals from pulse radiation detectors

Šaponjić, Đorđe; Arandjelovic, Vojislav; Stojic, Milic

(2006)

TY  - JOUR
AU  - Šaponjić, Đorđe
AU  - Arandjelovic, Vojislav
AU  - Stojic, Milic
PY  - 2006
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/3130
AB  - New algorithm for measurement of mean count rate of pulses from radiation detectors is described. The algorithm is based on the control of a bank of digital IIR filters governed by the state of mean count rate-stationary or transient. The algorithm solves successfully the compromise between the contradictory requirements for low statistical fluctuations in steady state and fast response to sudden changes of mean count rate. The design of the bank of IIR filters is carried out by using the Chebyshev approximation of the second kind in order to achieve the high selectivity and high stopband attenuation applying as low as possible order of the constituent filters. All designed filters are of the second order. The. static and dynamic characteristics of the new algorithm and the corresponding computational efficiency are tested and compared with those of the traditional ratemeter algorithms. The state of mean count rate, stationary or transient, is determined by a circuit for estimation of the gradient of mean count rate: The numbers of threshold levels within the adaptation logic circuit and their mutual positions have been optimized to achieve the best compromise.
T2  - IEEE Transactions on Nuclear Science
T1  - Digital control of a bank of IIR filters in optimal processing of signals from pulse radiation detectors
VL  - 53
IS  - 6
SP  - 3855
EP  - 3864
DO  - 10.1109/TNS.2006.883837
ER  - 
@article{
author = "Šaponjić, Đorđe and Arandjelovic, Vojislav and Stojic, Milic",
year = "2006",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/3130",
abstract = "New algorithm for measurement of mean count rate of pulses from radiation detectors is described. The algorithm is based on the control of a bank of digital IIR filters governed by the state of mean count rate-stationary or transient. The algorithm solves successfully the compromise between the contradictory requirements for low statistical fluctuations in steady state and fast response to sudden changes of mean count rate. The design of the bank of IIR filters is carried out by using the Chebyshev approximation of the second kind in order to achieve the high selectivity and high stopband attenuation applying as low as possible order of the constituent filters. All designed filters are of the second order. The. static and dynamic characteristics of the new algorithm and the corresponding computational efficiency are tested and compared with those of the traditional ratemeter algorithms. The state of mean count rate, stationary or transient, is determined by a circuit for estimation of the gradient of mean count rate: The numbers of threshold levels within the adaptation logic circuit and their mutual positions have been optimized to achieve the best compromise.",
journal = "IEEE Transactions on Nuclear Science",
title = "Digital control of a bank of IIR filters in optimal processing of signals from pulse radiation detectors",
volume = "53",
number = "6",
pages = "3855-3864",
doi = "10.1109/TNS.2006.883837"
}
Šaponjić, Đ., Arandjelovic, V.,& Stojic, M. (2006). Digital control of a bank of IIR filters in optimal processing of signals from pulse radiation detectors.
IEEE Transactions on Nuclear Science, 53(6), 3855-3864.
https://doi.org/10.1109/TNS.2006.883837
Šaponjić Đ, Arandjelovic V, Stojic M. Digital control of a bank of IIR filters in optimal processing of signals from pulse radiation detectors. IEEE Transactions on Nuclear Science. 2006;53(6):3855-3864
Šaponjić Đorđe, Arandjelovic Vojislav, Stojic Milic, "Digital control of a bank of IIR filters in optimal processing of signals from pulse radiation detectors" IEEE Transactions on Nuclear Science, 53, no. 6 (2006):3855-3864,
https://doi.org/10.1109/TNS.2006.883837 .
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Correction of a piezoresistive pressure sensor using a microcontroller

Šaponjić, Đorđe; Zigic, A

(2001)

TY  - JOUR
AU  - Šaponjić, Đorđe
AU  - Zigic, A
PY  - 2001
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/2429
AB  - A smart piezoresistive pressure sensor using a microcontroller is described. The microcontroller ensures temperature compensation and linearization of the sensor, as well as the data exchange. To compensate for the sensors imperfection, approximation of the sensor inverse response function by a second-order polynomial in terms of pressure and temperature is used. The maximum measurement error with respect to the full measurement range lies within +/-0.1%;, compared to the ideal sensor response function within the temperature range of 0-70 degreesC.
T2  - Instruments and Experimental Techniques
T1  - Correction of a piezoresistive pressure sensor using a microcontroller
VL  - 44
IS  - 1
SP  - 38
EP  - 44
DO  - 10.1023/A:1004168614028
ER  - 
@article{
author = "Šaponjić, Đorđe and Zigic, A",
year = "2001",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/2429",
abstract = "A smart piezoresistive pressure sensor using a microcontroller is described. The microcontroller ensures temperature compensation and linearization of the sensor, as well as the data exchange. To compensate for the sensors imperfection, approximation of the sensor inverse response function by a second-order polynomial in terms of pressure and temperature is used. The maximum measurement error with respect to the full measurement range lies within +/-0.1%;, compared to the ideal sensor response function within the temperature range of 0-70 degreesC.",
journal = "Instruments and Experimental Techniques",
title = "Correction of a piezoresistive pressure sensor using a microcontroller",
volume = "44",
number = "1",
pages = "38-44",
doi = "10.1023/A:1004168614028"
}
Šaponjić, Đ.,& Zigic, A. (2001). Correction of a piezoresistive pressure sensor using a microcontroller.
Instruments and Experimental Techniques, 44(1), 38-44.
https://doi.org/10.1023/A:1004168614028
Šaponjić Đ, Zigic A. Correction of a piezoresistive pressure sensor using a microcontroller. Instruments and Experimental Techniques. 2001;44(1):38-44
Šaponjić Đorđe, Zigic A, "Correction of a piezoresistive pressure sensor using a microcontroller" Instruments and Experimental Techniques, 44, no. 1 (2001):38-44,
https://doi.org/10.1023/A:1004168614028 .
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