Platinum–Cobalt Bimetallic Nanoparticles with Pt Skin for Electro-Oxidation of Ethanol
| Autor: | Hong-Gang Liao, Xi-Ming Qu, Tian Sheng, Shi Xue Dou, Shi-Gang Sun, Fuchun Zhu, Yan-Xia Jiang, Yunxiao Wang, Binwei Zhang, Junming Zhang, Zong-Cheng Zhang |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Inorganic chemistry chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Catalysis Nanomaterial-based catalyst 0104 chemical sciences chemistry Partial oxidation Fourier transform infrared spectroscopy 0210 nano-technology Platinum Cobalt Bimetallic strip |
| Zdroj: | ACS Catalysis. 7:892-895 |
| ISSN: | 2155-5435 |
| Popis: | In order to maximize the Pt utilization in catalysts and improve catalytic processes, we report a convenient strategy for preparation of Pt3Co with Pt-skin structured bimetallic nanocatalysts directly supported on porous graphitic carbon. Notably, the thickness of the Pt-skin is only 1–2 atomic layers, about 0.5 nm. Surprisingly, the bimetallic nanocatalysts composed of Pt3Co with Pt-skin are first used as ethanol electro-catalysts, with the mass activity of 0.79 mA μgPt–1, which is a 250% enhancement compared with commercial Pt/C (0.32 mA μgPt–1). On the basis of the results of electrochemical in situ Fourier transform infrared spectroscopy (FTIRS) and density functional theory (DFT), a new ethanol electro-oxidation enhancement mechanism is proposed in which Pt3Co with Pt-skin promotes partial oxidation of ethanol over C–C bond cleavage, thereby resulting in higher CH3COOH production than CO2 production. |
| Databáze: | OpenAIRE |
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