PtCu/C Materials Doped with Different Amounts of Gold as the Catalysts of Oxygen Electroreduction and Methanol Electrooxidation
| Autor: | V. S. Men’shchikov, A. Yu. Nikulin, N. M. Novikovskii, S. V. Belenov |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Nanoparticle chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Copper 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry Colloidal gold Methanol 0210 nano-technology Methanol fuel Carbon Nuclear chemistry |
| Zdroj: | Russian Journal of Electrochemistry. 56:660-668 |
| ISSN: | 1608-3342 1023-1935 |
| DOI: | 10.1134/s1023193520080029 |
| Popis: | The effect of the amount of gold used as the dopant of PtCu nanoparticles on the structure of PtCuAu/Cu catalysts and their activity in the reactions of oxygen reduction and methanol electrooxidation is studied. The PtCuAu/C materials containing from 3 to 20% of gold are prepared by galvanic displacement of copper atoms by gold atoms on the surface of already prepared PtCu nanoparticles. The addition of 5 at % Au to the composition of nanoparticles doubles their activity in the methanol oxidation and increases their activity in the oxygen reduction by a factor of 1.7 as compared with the commercial Pt/C material JM40. This study confirms that multicomponent platinum-containing nanoparticles supported by a highly disperse carbon material and having gold atoms deposited on their surface show promise as the efficient catalysts for the methanol fuel cells. In contrast, the materials containing 10 at % Au and more are characterized by the presence of gold nanoparticles on the carbon support surface and exhibit the lower catalytic activity as compared with those containing less amounts of gold. |
| Databáze: | OpenAIRE |
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