Surface reconstruction,doping and vacancy engineering to improve the overall water splitting of CoP nanoarrays  

作　　者：Yongkai Sun Wenyuan Sun Lihong Chen Alan Meng Guicun Li Lei Wang Jianfeng Huang Aili Song Zhenhui Zhang Zhenjiang Li 

机构地区：[1]College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China [2]College of Materials Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China [3]Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOE,College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,China [4]School of Material Science and Engineering,International S&T Cooperation Foundation of Shaanxi Province,Xi’an Key Laboratory of Green Manufacture of Ceramic Materials,Shaanxi University of Science and Technology,Xi’an 710021,China [5]Qingdao Huanghai University,Qingdao 266000,China

出　　处：《Nano Research》2023年第1期228-238,共11页纳米研究（英文版）

基　　金：The work reported here was supported by the National Natural Science Foundation of China(Nos.52072196,52002199,52002200,and 52102106);Major Basic Research Program of Natural Science Foundation of Shandong Province(No.ZR2020ZD09);the Natural Science Foundation of Shandong Province(Nos.ZR2019BEM042 and ZR2020QE063);the Innovation and Technology Program of Shandong Province(No.2020KJA004);the Taishan Scholars Program of Shandong Province(No.ts201511034).

摘　　要：Development of a general regulatory strategy for efficient overall water splitting remains a challenging task.Herein,a simple,costfairness,and general fluorination strategy is developed to realize surface reconstruction,heteroatom doping,and vacancies engineering over cobalt phosphide(CoP)for acquiring high-performance bifunctional electrocatalysts.Specifically,the surface of CoP nanoarrays(NAs)becomes rougher,meanwhile F doped into CoP lattice and creating amounts of P vacancies by fluorination,which caused the increase of active sites and regulation of charge distribution,resulting the excellent electrocatalyst performance of F-CoP NAs/copper foam(CF).The optimized F-CoP NAs/CF delivers a lower overpotential of only 35 mV at 10 mA·cm^(−2)for hydrogen evolution reaction(HER)and 231 mV at 50 mA·cm^(−2)for oxygen evolution reaction(OER),and the corresponding overall water splitting requires only 1.48 V cell voltage at 10 mA·cm^(−2),which are superior to the most state-of-theart reported electrocatalysts.This work provides an innovative and feasible strategy to construct efficient electrocatalysts.

关 键 词：FLUORINATION surface reconstruction F atom doping P vacancies overall water splitting 

分 类 号：O64[理学—物理化学]