Precisely tuning the electronic structure of a structurally ordered PtCoFe alloy via a dual-component promoter strategy for oxygen reduction
| Autor: | Hao Tang, Siguo Chen, Meng Wang, Lin Guo, Zidong Wei, Qingmei Wang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Component (thermodynamics) Alloy Metals and Alloys Nanoparticle 02 engineering and technology General Chemistry Electronic structure engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis Oxygen reduction 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Chemical engineering Homogeneous Materials Chemistry Ceramics and Composites engineering 0210 nano-technology Bimetallic strip |
| Zdroj: | Chemical Communications. 57:4047-4050 |
| ISSN: | 1364-548X 1359-7345 |
| DOI: | 10.1039/d1cc00608h |
| Popis: | Optimizing the electronic structure of Pt-based alloys has emerged as an effective strategy to further improve their catalytic oxygen reduction reaction (ORR) performance, yet this remains challenging. Here, we have successfully tuned the electronic structure of ordered PtCoFe nanoparticles by incorporating the third component (Fe) into a bimetallic ordered PtCo alloy and manipulating its content. With the merits of the optimum electronic structure and the favorable composition, as well as the robust ordered structure, the as-prepared ordered PtCoFe-1-0.6 alloy (1 and 0.6 represent the feeding molar ratio of Co to Pt and Fe to Pt, respectively) exhibits enhanced catalytic performance for ORR. The L10-PtCoFe-1-0.6 alloy delivers higher specific activity (2.23 mA cm−2) than bimetallic L10-PtCo-1 (1.34 mA cm−2) and the commercial Pt/C (0.23 mA cm−2) catalyst. Indeed, this dual-catalytic-component promoter strategy gives a significant insight into developing high-performance homogeneous catalysts. |
| Databáze: | OpenAIRE |
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