Nb-doped TiO2 as a support of Pt and Pt-Ru anode catalyst for PEMFCs
Апстракт
TiO2 doped by 0.5% Nb was synthesized by the acid-catalyzed sol-gel method. BET surface area was determined to be 72 m(2) g(-1). XRD measurements showed that TiO2 has structure of anatase with similar to 13 nm average crystallite size. Using Nb-TiO2 as a support, Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 were prepared by borohydride reduction method. TEM imaging of Pt-Ru/Nb-TiO2 revealed rather uniform distribution of the metallic particles on the support with a mean diameter of 3.8 nm. According to XRD analysis, Pt-Ru particles consist of the solid solution of Ru in Pt (40 at.% Ru) and a small amount of RuO2. Cyclic voltammetry of Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 indicated good conductivity of the supporting material. Oxidation of pre-adsorbed CO and methanol on Pt-Ru/Nb-TiO2 was faster than on Pt/Nb-TiO2. However, when the activities of Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 for methanol oxidation were compared to those of Pt/XC-72 and Pt-Ru/XC-72, no significant difference was observed. This means that Nb-TiO...2 is a promising replacement for high area carbon supports in PEMFC anodes, but without the influence on the reaction kinetics. (C) 2009 Elsevier B.V. All rights reserved.
Кључне речи:
Oxide support / TiO2 / Pt-Ru nanocatalyst / Methanol oxidation / Polymer electrolyte membrane fuel cellИзвор:
Journal of Electroanalytical Chemistry, 2010, 639, 1-2, 161-166Финансирање / пројекти:
- Ministry of Science and Development, Republic of Serbia [142038]
DOI: 10.1016/j.jelechem.2009.12.004
ISSN: 1572-6657
WoS: 000275137400023
Scopus: 2-s2.0-75349102327
Колекције
Институција/група
VinčaTY - JOUR AU - Gojković, Snežana Lj. AU - Babić, Biljana M. AU - Radmilovíć, Velimir R. AU - Krstajic, N. V. PY - 2010 UR - https://vinar.vin.bg.ac.rs/handle/123456789/3924 AB - TiO2 doped by 0.5% Nb was synthesized by the acid-catalyzed sol-gel method. BET surface area was determined to be 72 m(2) g(-1). XRD measurements showed that TiO2 has structure of anatase with similar to 13 nm average crystallite size. Using Nb-TiO2 as a support, Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 were prepared by borohydride reduction method. TEM imaging of Pt-Ru/Nb-TiO2 revealed rather uniform distribution of the metallic particles on the support with a mean diameter of 3.8 nm. According to XRD analysis, Pt-Ru particles consist of the solid solution of Ru in Pt (40 at.% Ru) and a small amount of RuO2. Cyclic voltammetry of Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 indicated good conductivity of the supporting material. Oxidation of pre-adsorbed CO and methanol on Pt-Ru/Nb-TiO2 was faster than on Pt/Nb-TiO2. However, when the activities of Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 for methanol oxidation were compared to those of Pt/XC-72 and Pt-Ru/XC-72, no significant difference was observed. This means that Nb-TiO2 is a promising replacement for high area carbon supports in PEMFC anodes, but without the influence on the reaction kinetics. (C) 2009 Elsevier B.V. All rights reserved. T2 - Journal of Electroanalytical Chemistry T1 - Nb-doped TiO2 as a support of Pt and Pt-Ru anode catalyst for PEMFCs VL - 639 IS - 1-2 SP - 161 EP - 166 DO - 10.1016/j.jelechem.2009.12.004 ER -
@article{ author = "Gojković, Snežana Lj. and Babić, Biljana M. and Radmilovíć, Velimir R. and Krstajic, N. V.", year = "2010", abstract = "TiO2 doped by 0.5% Nb was synthesized by the acid-catalyzed sol-gel method. BET surface area was determined to be 72 m(2) g(-1). XRD measurements showed that TiO2 has structure of anatase with similar to 13 nm average crystallite size. Using Nb-TiO2 as a support, Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 were prepared by borohydride reduction method. TEM imaging of Pt-Ru/Nb-TiO2 revealed rather uniform distribution of the metallic particles on the support with a mean diameter of 3.8 nm. According to XRD analysis, Pt-Ru particles consist of the solid solution of Ru in Pt (40 at.% Ru) and a small amount of RuO2. Cyclic voltammetry of Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 indicated good conductivity of the supporting material. Oxidation of pre-adsorbed CO and methanol on Pt-Ru/Nb-TiO2 was faster than on Pt/Nb-TiO2. However, when the activities of Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 for methanol oxidation were compared to those of Pt/XC-72 and Pt-Ru/XC-72, no significant difference was observed. This means that Nb-TiO2 is a promising replacement for high area carbon supports in PEMFC anodes, but without the influence on the reaction kinetics. (C) 2009 Elsevier B.V. All rights reserved.", journal = "Journal of Electroanalytical Chemistry", title = "Nb-doped TiO2 as a support of Pt and Pt-Ru anode catalyst for PEMFCs", volume = "639", number = "1-2", pages = "161-166", doi = "10.1016/j.jelechem.2009.12.004" }
Gojković, S. Lj., Babić, B. M., Radmilovíć, V. R.,& Krstajic, N. V.. (2010). Nb-doped TiO2 as a support of Pt and Pt-Ru anode catalyst for PEMFCs. in Journal of Electroanalytical Chemistry, 639(1-2), 161-166. https://doi.org/10.1016/j.jelechem.2009.12.004
Gojković SL, Babić BM, Radmilovíć VR, Krstajic NV. Nb-doped TiO2 as a support of Pt and Pt-Ru anode catalyst for PEMFCs. in Journal of Electroanalytical Chemistry. 2010;639(1-2):161-166. doi:10.1016/j.jelechem.2009.12.004 .
Gojković, Snežana Lj., Babić, Biljana M., Radmilovíć, Velimir R., Krstajic, N. V., "Nb-doped TiO2 as a support of Pt and Pt-Ru anode catalyst for PEMFCs" in Journal of Electroanalytical Chemistry, 639, no. 1-2 (2010):161-166, https://doi.org/10.1016/j.jelechem.2009.12.004 . .