Effect of Fe2O3 coating on ZnO nanowires in photoelectrochemical water splitting: A synchrotron x-ray spectroscopic and spectromicroscopic investigation
學年 108
學期 2
出版（發表）日期 2020-06-01
作品名稱 Effect of Fe2O3 coating on ZnO nanowires in photoelectrochemical water splitting: A synchrotron x-ray spectroscopic and spectromicroscopic investigation
作品名稱（其他語言）
著者 Y.R. Lu; Y.F. Wang; H.W. Chang; Y.C. Huang; J.L. Chen; C.L. Chen; Y.C. Lin; Y. G. Lin; W. F. Pong; T. Ohigashi; N. Kosugi; C.H. Kuo; W.C. Chou; C.L. Dong
單位
出版者
著錄名稱、卷期、頁數 Solar Energy Materials and Solar Cells 209, 110469
摘要 An array of ZnO/Fe2O3 core-shell nanowires (NW) for the highly efficient absorption of light and carrier collection is developed for use in photoelectrochemical (PEC) water-splitting. The oriented NW architecture favors physical matching, providing a direct electron conduction pathway and reducing the diffusion length of photogenerated holes. This work involves a combination of spectral imaging, spectromicroscopy and in situ x-ray absorption spectroscopy; spectra are obtained under operando conditions. Direct investigation of oriented nanowires using polarization-dependent x-ray spectromicroscopy enables the determination of the relationship between anisotropic electronic orbitals and charge carrier water-splitting efficiency. The results of O K-edge STXM demonstrated that the ZnO/Fe2O3 core-shell NW exhibits strong anisotropy and thus provides higher electron-hole transport efficiency than bare ZnO. In situ XAS revealed that interfacial charge transfer between Fe 3d and Zn 4p states enhances the photoelectrochemical reaction in the ZnO/Fe2O3 core-shell NW. The photogenerated electrons of Fe2O3 are transferred from Fe 3d states to the Zn 4p state under photoelectrochemical conditions.
關鍵字 In situ x-ray absorption spectroscopy;Scanning transmission x-ray microscope;PEC water splitting
語言 en_US
ISSN 0927-0248
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 否
國別 USA
公開徵稿
出版型式 ,電子版,紙本
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