Z-Scheme Transfer Path of Charges in the BiVO4/Bi:ZnIn2S4-Co Photoanode for Photoelectrochemical Water Splitting

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL

ACS Applied Energy Materials Pub Date : 2024-11-30 DOI:10.1021/acsaem.4c0234210.1021/acsaem.4c02342

Xinyang Fu, Yixin Qi, Yanan Zhao, Weibing Li* and Yaping Zhang*,

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Abstract

The significant carrier recombination occurring in the bulk of BiVO₄ is a primary factor limiting the enhancement of its photoelectrochemical performance. To address this issue, we have incorporated two-dimensional (2D) nanosheet morphology Bi:ZnIn₂S₄ and Co sites onto the surface of BiVO₄ to create an effective composite photoanode. According to the ultraviolet-visible diffuse reflectance spectroscopy and ultraviolet photoelectron spectroscopy results, it was inferred that a Z-scheme transfer path of charges was formed between BiVO₄ and Bi:ZnIn₂S₄, which promoted the separation of bulk phase carriers. Additionally, the 2D topography of Bi:ZnIn₂S₄ also shortens the transmission distance of the carriers. Furthermore, the presence of Co sites provides more active sites for the surface hydrolysis reaction to proceed. Ultimately, under AM1.5G illumination, the photocurrent density of the BiVO₄/Bi:ZnIn₂S₄-Co photoanode reaches 3.6 mA cm^–2 at 1.23 V vs reversible hydrogen electrodes.

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.