期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 138, 期 1, 页码 313-318出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.5b10977
关键词
-
资金
- NSF under the NSF Center [CHE-1305124]
- Welch Foundation [F-0021]
Nickel-iron mixed metal oxyhydroxides have attracted significant attention as an oxygen evolution reaction (OER) catalyst for solar fuel renewable energy applications. Here, we performed surface-selective and time-dependent redox titrations to directly measure the surface OER kinetics of Ni-IV and Fe-IV in NiOOH, FeOOH, and Ni1-xFexOOH (0 < x < 0.27) electrodes. Most importantly, two types of surface sites exhibiting fast and slow kinetics were found, where the fraction of fast sites in Ni1-xFexOOH matched the iron atom content in the film. This finding provides experimental support to the theory-proposed model of active sites in Ni1-xFexOOH. The OER rate constant of the fast site was 1.70 s(-1) per atom.
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