Characterization of a surface modified carbon cryogel and a carbon supported pt catalyst
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 a...
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2007-01-01
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| Series: | Journal of the Serbian Chemical Society |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/0352-5139/2007/0352-51390709773B.pdf |
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| author | Babić Biljana M. Kaluđerović Branka V. Vračar Ljiljana M. Radmilović Velimir Krstajić Nedeljko V. |
| author_facet | Babić Biljana M. Kaluđerović Branka V. Vračar Ljiljana M. Radmilović Velimir Krstajić Nedeljko V. |
| author_sort | Babić Biljana M. |
| collection | DOAJ |
| description | 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 (Sbet>400 m2 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 performed in 0.5 mol dm-3 HClO4 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 1/C vs. v0.5 extrapolation method was found to be 386 F g-1. The hydrogen oxidation reaction at the investigated Pt/C catalyst proceeded as an electrochemically reversible, two-electron direct discharge reaction. . |
| first_indexed | 2024-12-19T10:37:08Z |
| format | Article |
| id | doaj.art-698b6aa8be3644e9a67728b03f688697 |
| institution | Directory Open Access Journal |
| issn | 0352-5139 1820-7421 |
| language | English |
| last_indexed | 2024-12-19T10:37:08Z |
| publishDate | 2007-01-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-698b6aa8be3644e9a67728b03f6886972022-12-21T20:25:34ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51391820-74212007-01-01728-977378510.2298/JSC0709773B0352-51390709773BCharacterization of a surface modified carbon cryogel and a carbon supported pt catalystBabić Biljana M.0Kaluđerović Branka V.1Vračar Ljiljana M.2Radmilović Velimir3Krstajić Nedeljko V.4Institut za nuklerne nauke 'Vinča', BeogradInstitut za nuklerne nauke 'Vinča', BeogradTehnološko-metalurški fakultet, BeogradNational Center for Electron Microscopy, LBLN University of California, Berkeley, USATehnološko-metalurški fakultet, BeogradA 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 (Sbet>400 m2 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 performed in 0.5 mol dm-3 HClO4 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 1/C vs. v0.5 extrapolation method was found to be 386 F g-1. The hydrogen oxidation reaction at the investigated Pt/C catalyst proceeded as an electrochemically reversible, two-electron direct discharge reaction. .http://www.doiserbia.nb.rs/img/doi/0352-5139/2007/0352-51390709773B.pdfcarbon cryogelplatinum catalysthydrogen oxidationfuel cell |
| spellingShingle | Babić Biljana M. Kaluđerović Branka V. Vračar Ljiljana M. Radmilović Velimir Krstajić Nedeljko V. Characterization of a surface modified carbon cryogel and a carbon supported pt catalyst Journal of the Serbian Chemical Society carbon cryogel platinum catalyst hydrogen oxidation fuel cell |
| title | Characterization of a surface modified carbon cryogel and a carbon supported pt catalyst |
| title_full | Characterization of a surface modified carbon cryogel and a carbon supported pt catalyst |
| title_fullStr | Characterization of a surface modified carbon cryogel and a carbon supported pt catalyst |
| title_full_unstemmed | Characterization of a surface modified carbon cryogel and a carbon supported pt catalyst |
| title_short | Characterization of a surface modified carbon cryogel and a carbon supported pt catalyst |
| title_sort | characterization of a surface modified carbon cryogel and a carbon supported pt catalyst |
| topic | carbon cryogel platinum catalyst hydrogen oxidation fuel cell |
| url | http://www.doiserbia.nb.rs/img/doi/0352-5139/2007/0352-51390709773B.pdf |
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