期刊
INORGANIC CHEMISTRY
卷 58, 期 16, 页码 10802-10811出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.9b01089
关键词
-
资金
- National Natural Science Foundation of China [51502165, 51702193]
- Natural Science Basic Research Plan in Shaanxi Province of China [2017JQ5035]
- Natural Science Foundation of Education Department of Shaanxi Provincial [16JK1086]
- Scientific Research Fund of Shaanxi University of Science Technology [BJ16-20, BJ16-21]
Controlling the chemical bonding of an active atom and carbon support is an effective strategy for enhancing the electrocatalytic activity of a metal nitrogen/carbon catalyst. Herein, highly dispersed Co atoms are successfully prepared by using an ultrathin g-C3N4@carbon sphere as the support, and subsequently the well-defined Co-N and Co-O bonds on the atomic level are controllably constructed by adjusting the calcination atmosphere. Results show that highly dispersed Co with Co-O and Co-N bonds exhibits excellent oxygen evolution reaction performance in alkaline media at low and high overpotentials, respectively, and outperform most single-atom catalysts reported to date. DFT calculation, coupled with high-angle annular dark-field scanning transmission electron microscopy and X-ray photoelectron spectrometry techniques, reveals that the high activities mainly originate from the precise O-Co-N and N-Co-N coordination in the ultrathin g-C3N4@carbon sphere support. The enhancement mechanism of chemical bonding provides guidance for the atomic exploration and design of electrocatalysts.
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