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Characterization of a surface modified carbon cryogel and a carbon supported Pt catalyst

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2007
0352-51390709773B.pdf (3.514Mb)
Authors
Babić, Biljana M.
Kaluđerović, Branka V.
Vračar, Ljiljana M.
Radmilovic, Velimir
Krstajic, Nedeljko V.
Article
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Abstract
A carbon cryogel, synthesized by carbonization of a resorcinol/formaldehyde cryogel and oxidized in nitric acid, was used as catalyst Support for Pt nanoparticles. The Pt/C catalyst was prepared by a modified polyol synthesis method in an ethylene glycol (EG) solution. Characterization by nitrogen adsorption showed that the carbon cryogel support and the Pt/C catalyst were mesoporous materials with high specific surface areas (S-BET GT 400 m(2) g(-1)) and large mesoporous Volumes. X-Ray diffraction of the catalyst demonstrated the successful reduction of the Pt precursor to metallic form. TEM Images of the Pt/C catalyst and Pt particle size distribution showed that the mean Pt particle size was about 3.3 nm. Cyclic voltammetry (CV) experiments at various scan rates (from 2 to 200 mV s(-1)) were pet-formed in 0.5 mol dm(-3) HCIO4 solution. The large capacitance of the oxidized carbon cryogel electrode, which arises from a combination of the double-layer capacitance and pseudocapacitance..., associated with the participation of surface redox-type reactions was demonstrated. For the oxidized carbon cryogel, the total specific capacitance determined by I1/C vs. v(0.5) extrapolation method was found to be 386 F g-l. The hydrogen oxidation reaction at the investigated Pt/C catalyst proceeded as an electrochemically reversible, two-electron direct discharge reaction.

Keywords:
carbon cryogel / platinum catalyst / hydrogen oxidation / fuel cell
Source:
Journal of the Serbian Chemical Society, 2007, 72, 8-9, 773-785

DOI: 10.2298/JSC0709773B

ISSN: 0352-5139

WoS: 000249768600005

Scopus: 2-s2.0-34548415545
[ Google Scholar ]
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6
URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5484
Collections
  • Radovi istraživača / Researchers’ publications (TMF)
Institution/Community
Tehnološko-metalurški fakultet
TY  - JOUR
AU  - Babić, Biljana M.
AU  - Kaluđerović, Branka V.
AU  - Vračar, Ljiljana M.
AU  - Radmilovic, Velimir
AU  - Krstajic, Nedeljko V.
PY  - 2007
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5484
AB  - A carbon cryogel, synthesized by carbonization of a resorcinol/formaldehyde cryogel and oxidized in nitric acid, was used as catalyst Support for Pt nanoparticles. The Pt/C catalyst was prepared by a modified polyol synthesis method in an ethylene glycol (EG) solution. Characterization by nitrogen adsorption showed that the carbon cryogel support and the Pt/C catalyst were mesoporous materials with high specific surface areas (S-BET GT 400 m(2) g(-1)) and large mesoporous Volumes. X-Ray diffraction of the catalyst demonstrated the successful reduction of the Pt precursor to metallic form. TEM Images of the Pt/C catalyst and Pt particle size distribution showed that the mean Pt particle size was about 3.3 nm. Cyclic voltammetry (CV) experiments at various scan rates (from 2 to 200 mV s(-1)) were pet-formed in 0.5 mol dm(-3) HCIO4 solution. The large capacitance of the oxidized carbon cryogel electrode, which arises from a combination of the double-layer capacitance and pseudocapacitance, associated with the participation of surface redox-type reactions was demonstrated. For the oxidized carbon cryogel, the total specific capacitance determined by I1/C vs. v(0.5) extrapolation method was found to be 386 F g-l. The hydrogen oxidation reaction at the investigated Pt/C catalyst proceeded as an electrochemically reversible, two-electron direct discharge reaction.
T2  - Journal of the Serbian Chemical Society
T1  - Characterization of a surface modified carbon cryogel and a carbon supported Pt catalyst
EP  - 785
IS  - 8-9
SP  - 773
VL  - 72
DO  - 10.2298/JSC0709773B
ER  - 
@article{
author = "Babić, Biljana M. and Kaluđerović, Branka V. and Vračar, Ljiljana M. and Radmilovic, Velimir and Krstajic, Nedeljko V.",
year = "2007",
abstract = "A carbon cryogel, synthesized by carbonization of a resorcinol/formaldehyde cryogel and oxidized in nitric acid, was used as catalyst Support for Pt nanoparticles. The Pt/C catalyst was prepared by a modified polyol synthesis method in an ethylene glycol (EG) solution. Characterization by nitrogen adsorption showed that the carbon cryogel support and the Pt/C catalyst were mesoporous materials with high specific surface areas (S-BET GT 400 m(2) g(-1)) and large mesoporous Volumes. X-Ray diffraction of the catalyst demonstrated the successful reduction of the Pt precursor to metallic form. TEM Images of the Pt/C catalyst and Pt particle size distribution showed that the mean Pt particle size was about 3.3 nm. Cyclic voltammetry (CV) experiments at various scan rates (from 2 to 200 mV s(-1)) were pet-formed in 0.5 mol dm(-3) HCIO4 solution. The large capacitance of the oxidized carbon cryogel electrode, which arises from a combination of the double-layer capacitance and pseudocapacitance, associated with the participation of surface redox-type reactions was demonstrated. For the oxidized carbon cryogel, the total specific capacitance determined by I1/C vs. v(0.5) extrapolation method was found to be 386 F g-l. The hydrogen oxidation reaction at the investigated Pt/C catalyst proceeded as an electrochemically reversible, two-electron direct discharge reaction.",
journal = "Journal of the Serbian Chemical Society",
title = "Characterization of a surface modified carbon cryogel and a carbon supported Pt catalyst",
pages = "785-773",
number = "8-9",
volume = "72",
doi = "10.2298/JSC0709773B"
}
Babić, B. M., Kaluđerović, B. V., Vračar, L. M., Radmilovic, V.,& Krstajic, N. V.. (2007). Characterization of a surface modified carbon cryogel and a carbon supported Pt catalyst. in Journal of the Serbian Chemical Society, 72(8-9), 773-785.
https://doi.org/10.2298/JSC0709773B
Babić BM, Kaluđerović BV, Vračar LM, Radmilovic V, Krstajic NV. Characterization of a surface modified carbon cryogel and a carbon supported Pt catalyst. in Journal of the Serbian Chemical Society. 2007;72(8-9):773-785.
doi:10.2298/JSC0709773B .
Babić, Biljana M., Kaluđerović, Branka V., Vračar, Ljiljana M., Radmilovic, Velimir, Krstajic, Nedeljko V., "Characterization of a surface modified carbon cryogel and a carbon supported Pt catalyst" in Journal of the Serbian Chemical Society, 72, no. 8-9 (2007):773-785,
https://doi.org/10.2298/JSC0709773B . .

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