期刊
NANO LETTERS
卷 17, 期 10, 页码 6040-6046出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.7b02357
关键词
Oxygen evolution reaction; core-shell nanoparticles; electrocatalysts; nanostructures
类别
资金
- U.S. Department of Energy, Basic Energy Sciences, through the SUNCAT Center for Interface Science and Catalysis
- National Science Foundation Graduate Research Fellowship Program (NSF-GRFP)
- Danish Council for Independent Research
Enhanced catalysis for electrochemical oxygen evolution is essential for the efficacy of many renewable energy technologies, including water electrolyzers and metal-air batteries. Recently, Au supports have been shown to enhance the activity of many 3d transition metal-oxide thin films for the oxygen evolution reaction (OER) in alkaline media. Herein, we translate the beneficial impact of Au supports to high surface area, device-ready core-shell nanoparticles consisting of a Au-core and a metal-oxide shell (Au@MxOy where M = Ni, Co, Fe, and CoFe). Through a systematic evaluation, we establish trends in performance and illustrate the universal activity enhancement when employing the Au-core in the 3d transition metal-oxide nanoparticles. The highest activity particles, Au@CoFeOx, demonstrate an over potential of 328 +/- 3 mV over a 2 h stability test at 10 rnA cm(-2), illustrating that strategically coupling Au support and mixed metal-oxide effects in a core shell nanoparticle morphology is a promising avenue to achieve device-ready, high-performance OER catalysts.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据