A co-activation strategy for enhancing the performance of hematite in photoelectrochemical water oxidation

作     者：Boyao Xie Xingming Ning Shuoming Wei Jia Liu Jimei Zhang Xiaoquan Lu Boyao Xie;Xingming Ning;Shuoming Wei;Jia Liu;Jimei Zhang;Xiaoquan Lu

作者机构：Tianjin Key Laboratory of Molecular Optoelectronic ScienceDepartment of ChemistrySchool of ScienceTianjin UniversityTianjin 300072China State Key Laboratory of Separation Membranes and Membrane ProcessesSchool of Chemistry and Chemical EngineeringTiangong UniversityTianjin 300387China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2021年第32卷第7期

页      面：2279-2282页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(No.21575115) the Program for Chang Jiang Scholars and Innovative Research Team,Ministry of Education,China(No.IRT-16R61)。 

主　　题：Photoelectrochemical Phosphorus doping Charge separation CoAl-LDHs Hematite 

摘      要：Hematite(α-Fe_(2)O_(3))is a promising photoanode for photoelectrochemical(PEC)water splitting.However,the severe charge recombination and sluggish water oxidation kinetics extremely limit its use in photohydrogen conversion.Herein,a co-activation strategy is proposed,namely through phosphorus(P)doping and the loading of CoAl-layered double hydroxides(CoAl-LDHs)cocatalysts.Unexpectedly,the integrated system,CoAl-LDHs/P-Fe_(2)O_(3) photoanode,exhibits an outstanding photocurrent density of 1.56 mA/cm^(2) at 1.23 V(vs.reversible hydrogen electrode,RHE),under AM 1.5 G,which is 2.6 times of pureα-Fe_(2)O_(3).Systematic studies reveal that the remarkable PEC performance is attributed to accelerated surface OER kinetics and enhanced carrier separation efficiency.This work provides a feasible strategy to enhance the PEC performance of hematite photoanodes.