Thermally driven interfacial diffusion synthesis of nitrogen-doped carbon confined trimetallic Pt3CoRu composites for the methanol oxidation reaction
| Autor: | Pan Li, Siguo Chen, Zidong Wei, Huiying Lan, Xinyu Ping, Shumaila Ibraheem, Yijun Duan, Daojun Long, Qingmei Wang |
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| Rok vydání: | 2019 |
| Předmět: |
Interfacial diffusion
Materials science Renewable Energy Sustainability and the Environment Alloy Nanoparticle 02 engineering and technology General Chemistry engineering.material 021001 nanoscience & nanotechnology Redox Catalysis chemistry.chemical_compound chemistry Chemical engineering Activator (phosphor) engineering General Materials Science Methanol 0210 nano-technology Methanol fuel |
| Zdroj: | Journal of Materials Chemistry A. 7:18143-18149 |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/c9ta04412d |
| Popis: | A current challenge to direct methanol fuel cells (DMFCs) is the insufficient electrocatalytic activity and anti-CO poisoning ability of Pt-based alloy catalysts toward the methanol oxidation reaction (MOR). In this work, a simple thermally driven interfacial diffusion alloying method is adopted to synthesize Pt3CoRu/C@NC trimetallic nanoparticles (NPs) with enhanced MOR activity and anti-CO poisoning ability. The MOR mass activity of the Pt3CoRu/C@NC catalyst (0.97 mA μgPt−1) is 4.2 times larger than that of the commercial Pt/C catalyst (0.23 mA μgPt−1). Moreover, the Pt3CoRu/C@NC catalyst exhibits a much lower CO oxidation onset potential than the commercial Pt/C catalyst (0.35 V vs. 0.82 V), which directly indicates the improved anti-CO poisoning ability of the catalyst. This enhancement in MOR activity as well as anti-CO poisoning ability of the Pt3CoRu/C@NC catalyst is mainly attributed to the synergistic effect of Ru (as a water activator) and Co (as an electronic modifier). Indeed, this work not only provides a satisfactory strategy for improving the activity and anti-CO poisoning ability of MOR electrocatalysts but also gives a significant insight into simple and cost-effective alloying methods for developing homogeneous trimetallic alloy catalysts. |
| Databáze: | OpenAIRE |
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