Magnetic field-enhanced photoelectrochemical water splitting of Co_(3)O_(4)/TiO_(2)for efficient oxygen evolution

作     者：Ze-En Zhou Yi Lu Yi-Xuan Liu Shang Cao Ge Tian Zhi-Yi Hu Ling Shen Si-Ming Wu Jie Ying Wei Geng Xiao-Yu Yang 周泽恩;卢毅;刘艺璇;曹尚;田歌;胡执一;沈凌;吴思明;应杰;耿伟;阳晓宇

作者机构：State Key Laboratory of Advanced Technology for Materials Synthesis and Processing&Shenzhen Research Institute&Laoshan LaboratoryWuhan University of TechnologyWuhan 430070China National Energy Key Laboratory for New Hydrogen-Ammonia Energy TechnologiesFoshan Xianhu LaboratoryFoshan 528200China Nanostructure Research Centre(NRC)Wuhan University of TechnologyWuhan 430070China School of Chemical Engineering and TechnologySun Yat-sen UniversityZhuhai 519082China 

出 版 物：《Science China Materials》 (中国科学（材料科学）（英文版）)

年 卷 期：2024年第67卷第10期

页      面：3168-3175页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Key Research and Development Program of China(2022YFB3805600,2022YFB3805604) National Natural Science Foundation of China(52103285,22293020) Major Program(JD)of Hubei Province(2023BAA003) Natural Science Foundation of Hubei Province(2023AFB605) Dawning Program of Wuhan(2023020201020306) China Postdoctoral Science Foundation(2023M732722) National 111 Project(B20002) Jilin Province Science and Technology Development Plan(20220101248JC) Fundamental Research Funds for the Central Universities(WUT:2024IVA089) 

主　　题：photoelectrochemical water splitting Co_(3)O_(4)/TiO_(2) carrier separation efficiency stability 

摘      要：Effective separation of photogenerated carriers plays a vital role in governing the efficiency of photo-electrocatalytic ***,the advancement in enhancing the intrinsic carrier separation efficiency of semiconductors has shown limited ***,we reported the use of a magnetic field to improve the photoelectrochemical water splitting of a magnetic Co_(3)O_(4)/TiO_(2)photoanode by boosting the photogenerated carrier separation *** the presence of the magnetic field,oxygen evolution reaction occurs with a high photocurrent density of 0.86 mA cm^(−2)at 1.23 V versus VRHE,and an applied bias photon-to-current efficiency of 0.342%at 0.61 ***,the photoanode maintains its oxygen evolution reaction for more than 400 h with photocurrent decays by ca.10%.Observations made in this effort show that the enhancement of photo-electrocatalytic efficiency by a magnetic field is a consequence of the effect of the Lorentz force generated by the magnetic field on photogenerated carriers and ions near the Co_(3)O_(4)/TiO_(2)photoanode,which improves the carrier separation efficiency and the bubble release *** results suggest that manipulating photoelectrode carriers by using a magnetic field is a promising strategy to design high-performance photoelectrochemical for water splitting.