| Autor: |
Ioanna Mintsouli, Jenia Georgieva, Athanasios Papaderakis, Stephan Armyanov, Eugenia Valova, Volodymyr Khomenko, Stella Balomenou, Dimitrios Tsiplakides, Sotiris Sotiropoulos |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
|
| Zdroj: |
Journal of Electrochemical Science and Engineering, Vol 6, Iss 1 (2016) |
| Druh dokumentu: |
article |
| ISSN: |
1847-9286 |
| DOI: |
10.5599/jese.239 |
| Popis: |
Bimetallic Pt-Cu particles have been prepared by galvanic replacement of Cu precursor nanoparticles, upon the treatment of the latter with a chloro-platinate acidic solution. The resulting particles, typically a few tens of nm large, were supported on high surface area carbon (Vulcan® XC–72R, Cabot) and tested as electrodes. Surface electrochemistry in deaerated acid solutions was similar to that of pure Pt, indicating the existence of a Pt shell (hence the particles are denoted as Pt(Cu)). Pt(Cu)/C supported catalysts exhibit superior carbon monoxide and methanol oxidation activity with respect to their Pt/C analogues when compared on a per electroactive surface area basis, due to the modification of Pt activity by Cu residing in the particle core. However, as a result of large particle size and agglomeration phenomena, Pt(Cu)/C are still inferior to Pt/C when compared on a mass specific activity basis. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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