Improved water oxidation via Fe doping of CuWO4 photoanodes:Influence of the Fe source and concentration  

作　　者：Yue Sun Fenqi Du Donghang Xie Dongmei Yang Yang Jiao Lichao Jia Haibo Fan 孙岳;杜粉琦;谢东航;杨冬梅;焦阳;贾丽超;范海波(School of Physics,Northwest University,Xi'an 710069,China;School of Material Science and Engineering,Shaanxi Normal University,Xi'an 710119,China)

机构地区：[1]School of Physics,Northwest University,Xi'an 710069,China [2]School of Material Science and Engineering,Shaanxi Normal University,Xi'an 710119,China

出　　处：《Chinese Physics B》2020年第12期483-491,共9页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11204238);the Natural Science Foundation of Shaanxi Province,China(Grant No.2017JM1030).

摘　　要：Iron(Fe)was successfully doped in CuWO4 photoanode films with a combined liquid-phase spin-coating method via the dopant sources of Fe(NO3)3,FeSO4 and FeCl3.The microstructure of the prepared films was characterized by x-ray diffraction,scanning electron microscopy,and atomic force microscopy.The light absorption and photoelectric conversion properties were evaluated by the UV-visible absorption spectra and monochromatic incident photon-to-electron conversion efficiency.The chemical composition and element combination of the samples were examined by x-ray photoelectron spectroscopy.A linear sweep voltammetric and stability test(I-t)were performed with an electrochemical workstation.The results show that the samples are uniform with a thickness of approximately 800 nm and that the photoelectrochemical performance of the doped films is heavily dependent on the Fe source and dopant concentration.Upon optimizing the doping conditions of Fe(NO3)3 and the optimal source,the photocurrent density in the Fe-doped CuWO4 photoanode film is improved by 78%from 0.267 mA/cm2 to 0.476 mA/cm2 at 1.23 V vs reversible hydrogen electrode.The underlying causes are discussed.

关 键 词：photoanode thin film liquid phase method CuWO4 Fe doping 

分 类 号：O646.5[理学—物理化学] TB383.2[理学—化学]