电催化剂
析氧
电化学
材料科学
金属
氧气
调制(音乐)
Boosting(机器学习)
学位(音乐)
氧还原
化学工程
纳米技术
化学
化学物理
冶金
物理化学
计算机科学
电极
物理
有机化学
人工智能
工程类
声学
作者
Xinyue Zheng,Gan Jia,Guozheng Fan,Wenjun Luo,Zhaosheng Li,Zhigang Zou
出处
期刊:Small
[Wiley]
日期:2020-09-22
卷期号:16 (41)
被引量:49
标识
DOI:10.1002/smll.202003630
摘要
Seeking potential electrocatalysts with both large-scale application and robust activity for the oxygen evolution reaction allows for no delay. Herein, a squarate-based metal-organic framework (MOF) ([Co3 (C4 O4 )2 (OH)2 ]⋅3H2 O) is reported for electrocatalytic water oxidation. A facile, green, and low-cost strategy is proposed to introduce defects by not only rationally breaking CoO bonds to form defective coordination environment and electronic reconfiguration, but also systematically modulates defect concentration to optimize electrochemical performance. As a result, the post-treated surface defective MOF derivative (Co-MOF-3h) achieves a current density of 50 mA cm-2 at an overpotential of 380 mV, owing to larger active surface area, more opened active sites, and favorable conducting channels. Finally, density functional theory calculations have further validated the effect of defective coordination in regard to electronic structure for electrocatalysts. This study delivers inspirations in defect engineering and is in favor of developing high-efficiency electrocatalysts.
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