Spontaneous incorporation of gold in palladium-based ternary nanoparticles makes durable electrocatalysts for oxygen reduction reaction
| Autor: | Sufen Liu, Dennis Nordlund, Katharine E. Silberstein, Héctor D. Abruña, Eric D. Rus, David A. Muller, Hongfang Liu, Jie Wang, Feng Lin, Deli Wang, Michael A. Lowe, Ruoqian Lin, Masahiro Kawasaki, Huolin L. Xin |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Science General Physics and Astronomy chemistry.chemical_element Nanoparticle Nanotechnology Precious metal 02 engineering and technology 010402 general chemistry 01 natural sciences 7. Clean energy General Biochemistry Genetics and Molecular Biology Article Catalysis MD Multidisciplinary Multidisciplinary General Chemistry 021001 nanoscience & nanotechnology Nanomaterial-based catalyst 0104 chemical sciences chemistry 0210 nano-technology Platinum Ternary operation Cobalt Palladium |
| Zdroj: | Nature Communications Wang, Deli; Liu, Sufen; Wang, Jie; Lin, Ruoqian; Kawasaki, Masahiro; Rus, Eric; et al.(2016). Spontaneous incorporation of gold in palladium-based ternary nanoparticles makes durable electrocatalysts for oxygen reduction reaction.. Nature communications, 7(1), 11941. doi: 10.1038/ncomms11941. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/2c99s72r Nature Communications, Vol 7, Iss 1, Pp 1-9 (2016) |
| ISSN: | 2041-1723 |
| DOI: | 10.1038/ncomms11941. |
| Popis: | Replacing platinum by a less precious metal such as palladium, is highly desirable for lowering the cost of fuel-cell electrocatalysts. However, the instability of palladium in the harsh environment of fuel-cell cathodes renders its commercial future bleak. Here we show that by incorporating trace amounts of gold in palladium-based ternary (Pd6CoCu) nanocatalysts, the durability of the catalysts improves markedly. Using aberration-corrected analytical transmission electron microscopy in conjunction with synchrotron X-ray absorption spectroscopy, we show that gold not only galvanically replaces cobalt and copper on the surface, but also penetrates through the Pd–Co–Cu lattice and distributes uniformly within the particles. The uniform incorporation of Au provides a stability boost to the entire host particle, from the surface to the interior. The spontaneous replacement method we have developed is scalable and commercially viable. This work may provide new insight for the large-scale production of non-platinum electrocatalysts for fuel-cell applications. Replacement of platinum is important for lowering the cost of fuel-cell electrocatalysts, but less precious alternatives such as palladium are hindered by lower durability. Here, the authors show that incorporation of trace amounts of gold improves the durability of palladium based oxygen reduction catalysts. |
| Databáze: | OpenAIRE |
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