Spontaneous polarization enhanced bismuth ferrate photoelectrode:fabrication and boosted photoelectrochemical water splitting property  

作　　者：Yan ZHANG Yukun ZHU Yanhua PENG Xiaolong YANG Jian LIU Wei JIAO Jianqiang YU 

机构地区：[1]School of Chemistry and Chemical Engineering,Qingdao University,Qingdao 266071,China [2]State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China [3]Laboratory of Clean Energy Chemistry and Materials,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China

出　　处：《Frontiers in Energy》2021年第3期781-790,共10页能源前沿（英文版）

基　　金：This research was financially supported by the National Natural Science Foundation of China(Grant Nos.51402314 and 41206067);the Natural Science Foundation of Shandong Province(Grant No.ZR2016BM08);China Postdoctoral Science Foundation(No.2014M551869);Shandong Excellent Young Scientist Research Award Fund(No.BS2015CL002);Qingdao Postdoctoral Application Research Fund.

摘　　要：In this paper,the fabrication of a highly orientated Bi_(2)Fe_(4)O_(9)(BFO)photoelectrode in the presence of two-dimensional(2D)graphene oxide(GO)was reported.It was found that the GO can be used as a template for controlling the growth of BFO,and the nanoplate composites of BFO/reduced graphene oxide(RGO)with a high orientation can be fabricated.The thickness of the nanoplates became thinner as the ratio of GO increased.As a result,the ferroelectric spontaneous polarization unit arranges itself in the space in a periodic manner,leading to the formation of a polarization field along a special direction.Therefore,the created built-in electric field of the nanoplate composites of BFO/RGO is improved upon the increase of the amount of RGO.As expected,carrier separation is enhanced by the built-in electric field,therefore substantially enhancing the photoelectrochemical(PEC)activity of water splitting compared to pure BFO under the irradiation of visible-light.

关 键 词：bismuth ferrate ferroelectric polarisation photoelectrochemical(PEC)water splitting graphene oxide(GO) high orientation 

分 类 号：O64[理学—物理化学]