Effect of the Composition and Structure of Pt(Cu)/C Electrocatalysts on Their Stability under Different Stress Test Conditions
| Autor: | V. S. Men’shchikov, N. M. Novikovsky, A. A. Alekseenko, Vladimir E. Guterman, E. A. Moguchikh, N. Yu. Tabachkova |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Proton exchange membrane fuel cell Nanoparticle chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Copper 0104 chemical sciences Catalysis Chemical engineering chemistry 0210 nano-technology Platinum Voltammetry Bimetallic strip |
| Zdroj: | Russian Journal of Electrochemistry. 54:979-989 |
| ISSN: | 1608-3342 1023-1935 |
| DOI: | 10.1134/s102319351813030x |
| Popis: | Stability is one of the most important characteristics of electrocatalysts used in low-temperature fuel cells with a proton exchange membrane. The corrosion-morphological stability of supported electrocatalysts containing platinum and platinum-copper nanoparticles with ~20 wt % Pt was evaluated under the conditions of voltammetry stress testing corresponding to different degradation mechanisms. The effect of the difference in the architecture of Pt–Cu nanoparticles on the stability of catalysts and changes in their composition as a result of stress tests were studied. At close values of the electrochemically active surface area (ECAS), the carbon-supported bimetallic catalysts demonstrated significantly higher stability compared to the commercial Pt/C catalysts. The Pt(Cu)/C catalyst obtained by sequential deposition of copper and platinum showed the highest resistance to the degradation and selective dissolution of copper during the testing. |
| Databáze: | OpenAIRE |
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