Nitrogen incorporated oxygen vacancy enriched MnCo_(2)O_(x)/BiVO_(4) photoanodes for efficient and stable photoelectrochemical water splitting

作     者：Liangcheng Xu Yingjuan Zhang Boyan Liu Xin Wang Gangqiang Zhu Lianzhou Wang Songcan Wang Wei Huang 

作者机构：Frontiers Science Center for Flexible ElectronicsXi’an Institute of Flexible Electronics(IFE)Northwestern Polytechnical University127 West Youyi RoadXi’an 710072China School of Physics and Information TechnologyShaanxi Normal UniversityXi’an 710062China Nanomaterials CentreAustralian Institute for Bioengineering and Nanotechnology and School of Chemical EngineeringThe University of QueenslandBrisbaneQueensland 4072Australia Research&Development Institute of Northwestern Polytechnical University in ShenzhenSanhang Science&Technology BuildingNo.45thGaoxin South 9th RoadNanshan DistrictShenzhen 518063China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2024年第17卷第3期

页      面：1140-1150页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：The authors would like to acknowledge the financial support from National Natural Science Foundation of China(No.52002328) Shenzhen Science and Technology Program(No.JCYJ20220530161615035) the Practice and Innovation Funds for Graduate Students of Northwestern Polytechnical University(No.PF2023151) the Fundamental Research Funds for the Central Universities,and material characterizations from the Analytical&Testing Center of Northwestern Polytechnical University 

主　　题：water splitting oxygen evolution bismuth vanadate(BiVO_(4)) filling oxygen vacancies cocatalysts 

摘      要：Oxygen vacancies in oxygen evolution cocatalysts(OECs)can significantly improve the photoelectrochemical(PEC)water splitting performance of ***,OECs with abundant oxygen vacancies have a poor stability when exposing to the highly-oxidizing photogenerated ***,we partly fill oxygen vacancies in a MnCo_(2)O_(x) OEC with N atoms by a combined electrodeposition and sol-gel method,which dramatically improves both photocurrent density and stability of a BiVO_(4) *** optimized N filled oxygen vacancy-rich MnCo_(2)O_(x)/BiVO_(4) photoanode(3 at.%of N)exhibits an outstanding photocurrent density of 6.5 mA·cm^(-2) at 1.23 VRHE under AM 1.5 G illumination(100 mW·cm^(-2)),and an excellent stability of over 150 *** characterizations and theoretical calculations demonstrate that N atoms stabilize the defect structure and modulate the surface electron distribution,which significantly enhances the stability and further increases the photocurrent ***,other heteroatoms such as carbon,phosphorus,and sulfur are confirmed to have similar effects on improving PEC water splitting performance of photoanodes.