Fe-doped CoP nanotube heterostructure enhanced the catalytic activity of Pt nanoparticles towards methanol oxidation reaction
| Autor: | Mengyu Gan, Fei Xie, Li Ma, Minghang Jiang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Nanotube
Materials science Renewable Energy Sustainability and the Environment Doping Energy Engineering and Power Technology Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Redox 0104 chemical sciences Catalysis Anode chemistry.chemical_compound Direct methanol fuel cell Fuel Technology chemistry Chemical engineering Methanol 0210 nano-technology |
| Zdroj: | International Journal of Hydrogen Energy. 45:24807-24817 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.06.272 |
| Popis: | Developing the efficient and stable anode catalysts of direct methanol fuel cell has been a pivotal requirement for its extensive commercial application. Herein, we design the Fe-doped CoP nanotube heterostructure as the co-catalyst of Pt-based catalyst via combining a facile hydrothermal with phosphorization process, subsequently, the traditional NaBH4 reduction method is utilized to deposit Pt nanoparticles. As anticipated, Fe species have been successfully doped into CoP to generate the Fe-doped CoP nanotube heterostructure, and the involved characterizations identify that Pt–C/Fe2–CoP catalyst exhibits admirable mass activity (1237 mA·mg−1Pt) towards methanol oxidation reaction, which is approximately 2.04 and 3.66 times as high as the Pt–C/CoP (607 mA·mg−1Pt) and Pt–C–H (338 mA·mg−1Pt). After stability test, the decline ratio of mass activity for Pt–C/Fe2–CoP (83.43%) is markedly preferable to Pt–C/CoP (94.92%) and Pt–C–H (98.67%) catalysts. The enhanced catalytic activity and durability can be imputed to the formation of uniform Pt nanoparticles and co-catalysis effect of Fe-doped CoP nanotube heterostructure since the introduction of hetero-metal cations is able to effectively accelerate the charge transfer rate and adjust the electronic structure of material. Therefore, the fabrication of nanotube heterostructure and introduction of hetero-metal may provide a new direction to the development of other high-efficiency electrocatalysts. |
| Databáze: | OpenAIRE |
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