Characterisation of surface oxygen groups on different carbon materials by the Boehm method and temperature-programmed desorption
Апстракт
The surface characteristics of different carbon materials: activated carbon, carbon felt, glassy carbon and a porous carbon monolith were investigated. The specific surface area was examined by the BET method with N(2) adsorption, the amount and the type of surface oxygen groups by Boehm titration as well as by temperature-programmed desorption (TPD). By comparing the results obtained using BET analysis with those of TPD and the Boehm method, it was found that the number of surface groups was not proportional to the specific surface area. The total amount of oxygen groups, obtained by TPD, is higher than the amount obtained by Boehms method for porous samples. The inconsistencies between these results originate from the fact that the Boehm method is limited to the determination of acidic and basic groups, whereas TPD provides information on the total number of all surface oxygen groups. In addition, the presence of porosity could reduce the solvent-accessible surface in the Boehm metho...d. The TPD profiles of CO evolution showed the presence of a low temperature maximum, below 650 K, which originates from CO(2) reduction on the carbon material surface.
Кључне речи:
carbon materials / surface oxygen groups / temperature programmed desorptionИзвор:
Journal of the Serbian Chemical Society, 2011, 76, 5, 757-768Финансирање / пројекти:
- Ministry of Science and Technological Development of the Republic Serbia [151005B, 142002]
DOI: 10.2298/JSC091224056K
ISSN: 0352-5139
WoS: 000291413700011
Scopus: 2-s2.0-79957459508
Колекције
Институција/група
VinčaTY - JOUR AU - Kalijadis, Ana AU - Vukčević, Marija M. AU - Jovanović, Zoran M. AU - Laušević, Zoran AU - Laušević, Mila D. PY - 2011 UR - https://vinar.vin.bg.ac.rs/handle/123456789/4342 AB - The surface characteristics of different carbon materials: activated carbon, carbon felt, glassy carbon and a porous carbon monolith were investigated. The specific surface area was examined by the BET method with N(2) adsorption, the amount and the type of surface oxygen groups by Boehm titration as well as by temperature-programmed desorption (TPD). By comparing the results obtained using BET analysis with those of TPD and the Boehm method, it was found that the number of surface groups was not proportional to the specific surface area. The total amount of oxygen groups, obtained by TPD, is higher than the amount obtained by Boehms method for porous samples. The inconsistencies between these results originate from the fact that the Boehm method is limited to the determination of acidic and basic groups, whereas TPD provides information on the total number of all surface oxygen groups. In addition, the presence of porosity could reduce the solvent-accessible surface in the Boehm method. The TPD profiles of CO evolution showed the presence of a low temperature maximum, below 650 K, which originates from CO(2) reduction on the carbon material surface. T2 - Journal of the Serbian Chemical Society T1 - Characterisation of surface oxygen groups on different carbon materials by the Boehm method and temperature-programmed desorption VL - 76 IS - 5 SP - 757 EP - 768 DO - 10.2298/JSC091224056K ER -
@article{ author = "Kalijadis, Ana and Vukčević, Marija M. and Jovanović, Zoran M. and Laušević, Zoran and Laušević, Mila D.", year = "2011", abstract = "The surface characteristics of different carbon materials: activated carbon, carbon felt, glassy carbon and a porous carbon monolith were investigated. The specific surface area was examined by the BET method with N(2) adsorption, the amount and the type of surface oxygen groups by Boehm titration as well as by temperature-programmed desorption (TPD). By comparing the results obtained using BET analysis with those of TPD and the Boehm method, it was found that the number of surface groups was not proportional to the specific surface area. The total amount of oxygen groups, obtained by TPD, is higher than the amount obtained by Boehms method for porous samples. The inconsistencies between these results originate from the fact that the Boehm method is limited to the determination of acidic and basic groups, whereas TPD provides information on the total number of all surface oxygen groups. In addition, the presence of porosity could reduce the solvent-accessible surface in the Boehm method. The TPD profiles of CO evolution showed the presence of a low temperature maximum, below 650 K, which originates from CO(2) reduction on the carbon material surface.", journal = "Journal of the Serbian Chemical Society", title = "Characterisation of surface oxygen groups on different carbon materials by the Boehm method and temperature-programmed desorption", volume = "76", number = "5", pages = "757-768", doi = "10.2298/JSC091224056K" }
Kalijadis, A., Vukčević, M. M., Jovanović, Z. M., Laušević, Z.,& Laušević, M. D.. (2011). Characterisation of surface oxygen groups on different carbon materials by the Boehm method and temperature-programmed desorption. in Journal of the Serbian Chemical Society, 76(5), 757-768. https://doi.org/10.2298/JSC091224056K
Kalijadis A, Vukčević MM, Jovanović ZM, Laušević Z, Laušević MD. Characterisation of surface oxygen groups on different carbon materials by the Boehm method and temperature-programmed desorption. in Journal of the Serbian Chemical Society. 2011;76(5):757-768. doi:10.2298/JSC091224056K .
Kalijadis, Ana, Vukčević, Marija M., Jovanović, Zoran M., Laušević, Zoran, Laušević, Mila D., "Characterisation of surface oxygen groups on different carbon materials by the Boehm method and temperature-programmed desorption" in Journal of the Serbian Chemical Society, 76, no. 5 (2011):757-768, https://doi.org/10.2298/JSC091224056K . .