ZnCdS-BiFeO_(3) heterojunction loaded with cobalt catalyst boosting photoelectrocatalytic hydrogen evolution  

ZnCdS-BiFeO_(3)异质结负载钴催化剂促进光电催化产氢

作　　者：Ling Wang Qing Lou Haixia Qian Xiaoshuang Yin Ying Liu Wenzhong Yang Hui Xu 王玲;娄青;钱海霞;尹晓爽;刘瑛;杨文忠;徐晖(Institute of Advanced Synthesis,School of Chemistry and Molecular Engineering,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]Institute of Advanced Synthesis,School of Chemistry and Molecular Engineering,Nanjing Tech University,Nanjing 211816,China

出　　处：《Science China Materials》2025年第2期483-492,共10页中国科学(材料科学)(英文版)

基　　金：supported by the National Natural Science Foundation of China(52002169);the Natural Science Foundation of Jiangsu Province(BK20231277);the Nanjing Tech University Start-up Grant(39837122)。

摘　　要：The advancement of a Z-scheme photoelectrochemical(PEC)system for hydrogen production and watersplitting holds significant promise in addressing the escalatingglobal energy crisis.In this study,a ternary Co-ZnCdS-BiFeO_(3)Z-scheme composite photocatalyst was used.By optimizingthe ratio of BiFeO_(3)/ZnCdS,the photocatalytic activity of thematerial is enhanced,while enhancing the electron transferefficiency and strengthening the stability of the photoelectriccathode.The Co(dmgBF2)_(2)(H_(2)O)_(2)was selected as the co-catalystto further improve the electron-hole separation efficiencyand photocorrosion resistance.Under visible light irradiation,the hydrogen production rate of the PEC system can reach4.03 mmol g^(-1)h^(-1).Under optimal conditions,applying a biasvoltage of−0.1 V vs.RHE can produce−38.5μA cm^(−2).Thephotocatalytic current density of is as high as 13 times that ofpure ZnCdS,greatly improving the hydrogen production efficiency and stability of the photocatalyst.The study offers anovel benchmark for the development of a high efficiency Zscheme photocatalyst designed for water splitting and provides new insights into intrinsic resistance through PEC analyses.Z-型光电化学(PEC)系统在氢气生产和水分解方面的发展,对解决日益严重的全球能源危机具有重要意义.在这项研究中,使用了一种三元Co-ZnCdS-BiFeO_(3)Z-型复合光催化剂.通过优化BiFeO_(3)/ZnCdS的比例,不仅增强了材料的光催化活性,还提升了电子传输效率,并增强了光电阴极的稳定性.选择Co(dmgBF2)_(2)(H_(2)O)_(2)作为助催化剂,以进一步提高电子-空穴分离效率和光腐蚀抵抗力.在可见光照射下,光电化学系统的产氢速率可达到4.03 mmol g^(-1)h^(-1).在最佳条件下,施加-0.1 V vs.RHE的偏压可产生-38.5μA cm^(-2)的电流密度.其光催化电流密度比纯ZnCdS高出13倍,大大提高了光催化剂的产氢效率和稳定性.本研究为设计用于水分解的高效Z-型光催化剂树立了新的标杆,并通过PEC分析提供了关于内在阻力的全新见解.

关 键 词：ZnCdS-BiFeO_(3) PHOTOELECTROCHEMICAL hydrogen evolution reaction visible light cobaloxime catalyst 

分 类 号：F42[经济管理—产业经济]