Gd-doped CuBi_(2)O_(4)/CuO heterojunction film photocathodes for photoelectrochemical H_(2)O_(2)production through oxygen reduction  

作　　者：Zixin Li Quanlong Xu Faliang Gou Bing He Wei Chen Weiwei Zheng Xu Jiang Kai Chen Chenze Qi Dekun Ma 

机构地区：[1]Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process,Shaoxing University,Shaoxing 312000,China [2]Zhejiang Key Laboratory of Carbon Materials,Wenzhou University,Wenzhou 325027,China [3]Department of Chemistry,Syracuse University,Syracuse,New York 13244,USA

出　　处：《Nano Research》2021年第10期3439-3445,共7页纳米研究（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.21673160 and 12075154);Natural Science Foundation of Zhejiang for Distinguished Young Scholars(No.LR16B010002);startup funds of Shaoxing University.

摘　　要：Photoelectrochemical oxygen reduction reaction(ORR)toward H_(2)O_(2)is highly desirable because only sunlight,O_(2)and water are required in the process.However,the corresponding studies are still at its infancy because of the lack of suitable photocathodes,especially inorganic semiconductor photocathodes.In this work,we report CuBi_(2)O_(4)/CuO(CBO/CuO)heterojunction submicrocrystalline film photocathodes with efficient ORR activity for H_(2)O_(2)production.The heterojunction film photocathodes were prepared through thermal evaporation of Cu and Bi metals under vacuum and subsequent annealing treatment.Furthermore,the doping of Gd^(3+)ions into CBO/CuO could significantly enhance the yield of H_(2)O_(2).As a result,the concentration of H_(2)O_(2)could reach 1.3 mM within 30 min,which is 6 times higher than that obtained on the pristine CBO/CuO photocathode.The theoretical calculations suggested that the introduction of Gd could adjust the electronic structure of CBO surface and promote 2e ORR pathway for selective production of H_(2)O_(2).Our work not only provides a new strategy for designing highly efficient photocathode for H_(2)O_(2)production but also will evoke more interest in photoelectrocatalytic ORR through inorganic semiconductor photocathode.

关 键 词：CuBi_(2)O_(4) Gd^(3+)ions doping O_(2)reduction reaction H_(2)O_(2)production photoelectrochemical cell 

分 类 号：O646[理学—物理化学]