期刊
CHEM
卷 4, 期 5, 页码 1153-1166出版社
CELL PRESS
DOI: 10.1016/j.chempr.2018.02.010
关键词
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资金
- National Natural Science Foundation of China [51671003, 11504309, 21771156]
- National Basic Research Program of China [2017YFA0206701, 2016YFB0100201]
- Open Project Foundation of the State Key Laboratory of Chemical Resource Engineering
- Beijing Innovation Center for Engineering Science and Advanced Technology
- Peking University
- Young Thousand Talented Program
- General Research Fund of the Hong Kong Polytechnic University Department of Applied Biology and Chemical Technology
- Early Carreer Scheme Fund from the Research Grant Council in Hong Kong [PolyU 253026/16P]
Designing highly efficient interface catalysts with new interface-enhancing mechanisms for the oxygen reduction reaction (ORR) in acid solution still remains a significant challenge. Here, we report a class of stable PtFe-Fe2C Janus-like nanoparticle (NP) interface catalysts with an unrevealed barrier-free interface electron-transfer property that greatly boosts ORR catalytic activity and stability. The PtFe-Fe2C Janus-like NPs showed much higher catalytic activity for ORR than either PtFe or Fe2C NPs in both acidic and alkaline electrolytes. Density functional theory simulations revealed that a barrier-free interface electron transfer on the interface of PtFe-Fe2C Janus-like NPs is the main factor in enhancing ORR activity. This interface electron-transfer property makes them the most active for ORR among all reported PtFe-based nanocatalysts. We further demonstrate that this barrier-free interface electron-transfer property can be readily generalized to other systems, such as the hydrogen evolution reaction and H2O2 reduction electrocatalysis, to achieve better electrocatalytic enhancement.
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