학술논문
Operando double-edge high-resolution X-ray absorption spectroscopy study of BiVO4 photoanodes.
Document Type
Article
Author
Source
Subject
*X-ray spectroscopy
*X-ray fluorescence
*X-ray absorption
*ELECTRIC batteries
*ELECTRONIC structure
*X-rays
*INELASTIC scattering
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Language
ISSN
0909-0495
Abstract
High energy resolution fluorescence detected X-ray absorption spectroscopy is a powerful method for probing the electronic structure of functional materials. The X-ray penetration depth and photon-in/photon-out nature of the method allow operando experiments to be performed, in particular in electrochemical cells. Here, operando high-resolution X-ray absorption measurements of a BiVO4 photoanode are reported, simultaneously probing the local electronic states of both cations. Small but significant variations of the spectral lineshapes induced by the applied potential were observed and an explanation in terms of the occupation of electronic states at or near the band edges is proposed. [ABSTRACT FROM AUTHOR]