期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 8, 期 3, 页码 1520-1526出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.9b06015
关键词
PtPdCu-alloyed catalyst; concave structure; site-selective overgrowth; high-index facet
资金
- National Basic Research Program of China [2015CB932304]
- National Key Research and Development Plan [2017YFB0103001]
- Guangxi Science and Technology Project [AA17204083, AB16380030]
- National Natural Science Foundation of China [U1705252]
- National Natural Science Foundation of Fujian Province [U1705252]
- Natural Science Foundation of Guangdong Province [2015A030312007]
- Danish project of Initiative towards Non-precious Metal Polymer Fuel Cells [4106-000012B]
Tailoring the composition and morphology of Pt-based catalysts is an effective approach for achieving both reduction in Pt usage and improvement in electrocatalytic performance. Herein, we develop a facile one-pot method for the direct preparation of PtPdCu hexapod concave rhombic dodecahedrons (HCRDs). The well-defined PtPdCu HCRDs possess excavated structure and six site-selective arms, which are preferentially located at six 000 vertexes of a central excavated rhombic dodecahedron and covered with high-index facets. Regulating the addition of Br ions could alter the morphology of nanocrystals easily due to different etching degrees and selective overgrowth. Introducing specific amounts of Pd contributes to the excellent electrocatalytic activity and stability of PtPdCu HCRDs catalyst for both oxygen reduction and methanol oxidation reaction compared to commercial Pt/C. This work provides a simple strategy for rationally designing trimetallic electrocatalysts with controlled morphology and enhanced catalytic performance.
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