摘要
Water electrolysis is considered to be an effective and promising technology to make high-purity H_(2),however,the relationship between anion species and catalytic performance of electrocatalysts is still not completely clear.Herein,we report an anion engineering strategy to tune electrocatalytic water oxidation activity for Co-based materials.Novel hierarchical Co-based oxide/selenide/phosphide(Co-A,A = O,Se,P)hexagrams have been chosen as model materials.Electrochemical results and theoretical calculations reveal that the electron configuration,the electrical conductivity,and the oxidation potential of Co element in Co-A hexagrams could be moderated by the substitution of P atoms,which leads to the superior OER performance.Particularly,Co-P hexagram displays a low overpotential(η = 269 mV) at j = 10 mA/cm^(2) for the oxygen evolution reaction(OER) compared to Co-O hexagram(η = 399 m V) and Co-Se hexagram(η = 347 mV).This work is of great importance in understanding coordination atoms(O,Se and P)induced electrocatalytic properties of hierarchical Co-based materials.
基金
support from the National Natural Science Foundation of China (Nos.21808138, 21773146, 21975148 and21601118)
Fok Ying-Tong Education Foundation for Outstanding Young Teachers in University
China Postdoctoral Science Foundation (No.2019T120877)
Fundamental Research Funds for the Central Universities (No.GK202103029)
Young Talent Fund ofUniversity Association for Science and Technology in Shaanxi,China (No.20200602)。
作者简介
Corresponding author:Haoquan Zheng,E-mail addresses:zhenghaoquan@snnu.edu.cn;Corresponding author:Rui Cao,E-mail addresses:ruicao@snnu.edu.cn。
