期刊
NANO LETTERS
卷 16, 期 1, 页码 781-785出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b04794
关键词
bimetallic catalysts; oxygen evolution reaction; X-ray absorption spectroscopy; nanostructures; alloys
类别
资金
- U.S. Department of Energy under the Vehicle Technologies Office, Department of Energy, Office of Energy Efficiency and Renewable Energy (EERE) [DE-AC0206CH11357]
- U.S. Department of Energy
- MRCAT
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-AC02-06CH11357]
The oxygen evolution reaction (OER) plays a critical role in multiple energy conversion and storage applications. However, its sluggish kinetics usually results in large voltage polarization and unnecessary energy loss. Therefore, designing efficient catalysts that could facilitate this process has become an emerging topic. Here, we present a unique Pt-Cu core-shell nanostructure for catalyzing the nonaqueous OER. The catalysts were systematically investigated with comprehensive spectroscopic techniques, and applied in nonaqueous Li-O-2 electrochemical cells, which exhibited dramatically reduced charging overpotential (<0.2 V). The superior performance is explained by the robust Cu(I) surface sites stabilized by the Pt core in the nanostructure. The insights into the catalytic mechanism of the unique Pt-Cu core-shell nanostructure gained in this work are expected to serve as a guide for future design of other nanostructured bimetallic OER catalysts.
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