Study of gold-platinum and platinum-gold surface modification and its influence on hydrogen evolution and oxygen reduction
Surface modification of the electrodes was conducted from sulfuric acid solutions containing the corresponding metal-chloride complexes using cyclic voltammeter. Comparing the charges of the hydrogen underpotential deposition region, and the corresponding oxide reduction regions, it is concluded tha...
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2005-01-01
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| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0352-5139/2005/0352-51390502231D.pdf |
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| author | Dešić Maja N. Popović Milica M. Obradović Maja D. Vračar Ljiljana M. Grgur Branimir N. |
| author_facet | Dešić Maja N. Popović Milica M. Obradović Maja D. Vračar Ljiljana M. Grgur Branimir N. |
| author_sort | Dešić Maja N. |
| collection | DOAJ |
| description | Surface modification of the electrodes was conducted from sulfuric acid solutions containing the corresponding metal-chloride complexes using cyclic voltammeter. Comparing the charges of the hydrogen underpotential deposition region, and the corresponding oxide reduction regions, it is concluded that a platinum overlayer on gold forms 3D islands, while gold on platinum forms 2D islands. Foreign metals present in an amount of up to one monolayer exert an influence on the change in reaction rate with respect to both hydrogen evolution (HER) and oxygen reduction (ORR) reactions. Aplatinum overlayer on a gold substrate increases the activity for HER and for ORR, compared with pure gold. These results can be understood in terms of a simple model, in which the change in the H and OH binding energies are directly proportional to the shift of the d-bond center of the overlayer. On the contrary, a gold layer on platinum slightly decreases the activity for both reactions compared with pure platinum. |
| first_indexed | 2024-12-19T10:36:02Z |
| format | Article |
| id | doaj.art-37a074d0f7a848d1ab403611f289d1ce |
| institution | Directory Open Access Journal |
| issn | 0352-5139 1820-7421 |
| language | English |
| last_indexed | 2024-12-19T10:36:02Z |
| publishDate | 2005-01-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-37a074d0f7a848d1ab403611f289d1ce2022-12-21T20:25:37ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51391820-74212005-01-0170223124210.2298/JSC0502231D0352-51390502231DStudy of gold-platinum and platinum-gold surface modification and its influence on hydrogen evolution and oxygen reductionDešić Maja N.0Popović Milica M.1Obradović Maja D.2Vračar Ljiljana M.3Grgur Branimir N.4Faculty of Technology and Metallurgy, BelgradeFaculty of Technology and Metallurgy, BelgradeInstitute of Chemistry, Technology and Metallurgy - Department of Electrochemistry, Belgrade, Serbia and MontenegroFaculty of Technology and Metallurgy, BelgradeFaculty of Technology and Metallurgy, BelgradeSurface modification of the electrodes was conducted from sulfuric acid solutions containing the corresponding metal-chloride complexes using cyclic voltammeter. Comparing the charges of the hydrogen underpotential deposition region, and the corresponding oxide reduction regions, it is concluded that a platinum overlayer on gold forms 3D islands, while gold on platinum forms 2D islands. Foreign metals present in an amount of up to one monolayer exert an influence on the change in reaction rate with respect to both hydrogen evolution (HER) and oxygen reduction (ORR) reactions. Aplatinum overlayer on a gold substrate increases the activity for HER and for ORR, compared with pure gold. These results can be understood in terms of a simple model, in which the change in the H and OH binding energies are directly proportional to the shift of the d-bond center of the overlayer. On the contrary, a gold layer on platinum slightly decreases the activity for both reactions compared with pure platinum.http://www.doiserbia.nb.rs/img/doi/0352-5139/2005/0352-51390502231D.pdfplatinumgoldmodified electrodeshydrogen evolutionoxygen reduction |
| spellingShingle | Dešić Maja N. Popović Milica M. Obradović Maja D. Vračar Ljiljana M. Grgur Branimir N. Study of gold-platinum and platinum-gold surface modification and its influence on hydrogen evolution and oxygen reduction Journal of the Serbian Chemical Society platinum gold modified electrodes hydrogen evolution oxygen reduction |
| title | Study of gold-platinum and platinum-gold surface modification and its influence on hydrogen evolution and oxygen reduction |
| title_full | Study of gold-platinum and platinum-gold surface modification and its influence on hydrogen evolution and oxygen reduction |
| title_fullStr | Study of gold-platinum and platinum-gold surface modification and its influence on hydrogen evolution and oxygen reduction |
| title_full_unstemmed | Study of gold-platinum and platinum-gold surface modification and its influence on hydrogen evolution and oxygen reduction |
| title_short | Study of gold-platinum and platinum-gold surface modification and its influence on hydrogen evolution and oxygen reduction |
| title_sort | study of gold platinum and platinum gold surface modification and its influence on hydrogen evolution and oxygen reduction |
| topic | platinum gold modified electrodes hydrogen evolution oxygen reduction |
| url | http://www.doiserbia.nb.rs/img/doi/0352-5139/2005/0352-51390502231D.pdf |
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