过电位
化学
催化作用
析氧
电化学
电催化剂
X射线吸收光谱法
格子(音乐)
氢氧化物
电化学能量转换
化学工程
物理化学
组合化学
化学物理
纳米技术
无机化学
吸收光谱法
电极
材料科学
有机化学
工程类
物理
量子力学
声学
作者
Changti Pan,Jiahui Zhao,Baojie Zhang,Jie Wang,Xiaokun Huo,Li Yang,Ke Xu,Yu Zhou,Lei Shan,Yunxiang Lin
标识
DOI:10.1021/acs.inorgchem.3c01617
摘要
Realizing a highly efficient oxygen evolution reaction (OER) process is of great significance for hydrogen energy development. The main challenge still lies in fabricating superior electrocatalysts with favorable performance. Constructing electrocatalysts with ingenious lattice modifications is a considerable way for the rational design of highly active catalytic centers. Here, theoretical calculations predict that the lattice incorporation of Se atoms can effectively enhance the reaction activity of OER with a decreased energy barrier for the rate-determining step. To obtain the corresponding desired electrocatalyst, the optimized lattice Se-modified CoOOH, with the ideal OER performance of low overpotential and stability, was delicately designed and fabricated by the electrochemical activation of the Co0.85Se precatalyst. X-ray absorption spectroscopy (XAS) demonstrates that lattice incorporation is more likely to be generated in Co0.85Se compared to CoSe2 and CoO precatalysts, which promoted the subsequent OER process. This work clarified the correlation between the precatalyst and the lattice-modified final catalyst in connection with electrochemical reconstruction.
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