Efficient BiVO4 Photoanodes by Postsynthetic Treatment: Remarkable Improvements in Photoelectrochemical Performance from Facile Borate Modification

Qijun Meng; Biaobiao Zhang; Lizhou Fan; Haidong Liu; Mario Valvo; Kristina Edstrom; Maria Cuartero; Roland De Marco; Gaston A Crespo; Licheng Sun

doi:10.1002/anie.201911303

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Efficient BiVO4 Photoanodes by Postsynthetic Treatment: Remarkable Improvements in Photoelectrochemical Performance from Facile Borate Modification

Journal article

Peer reviewed

Efficient BiVO4 Photoanodes by Postsynthetic Treatment: Remarkable Improvements in Photoelectrochemical Performance from Facile Borate Modification

Qijun Meng, Biaobiao Zhang, Lizhou Fan, Haidong Liu, Mario Valvo, Kristina Edstrom, Maria Cuartero, Roland De Marco, Gaston A Crespo and Licheng Sun

Angewandte Chemie, Vol.131(52), pp.19203-19209

2019

DOI: https://doi.org/10.1002/anie.201911303

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Abstract

Chemical Sciences

artificial photosynthesis

BiVO4

borate

photoelectrochemical cells

water oxidation

Water-splitting photoanodes based on semiconductor materials typically require a dopant in the structure and co-catalysts on the surface to overcome the problems of charge recombination and high catalytic barrier. Unlike these conventional strategies, a simple treatment is reported that involves soaking a sample of pristine BiVO4 in a borate buffer solution. This modifies the catalytic local environment of BiVO4 by the introduction of a borate moiety at the molecular level. The self-anchored borate plays the role of a passivator in reducing the surface charge recombination as well as that of a ligand in modifying the catalytic site to facilitate faster water oxidation. The modified BiVO4 photoanode, without typical doping or catalyst modification, achieved a photocurrent density of 3.5 mA cm-2 at 1.23 V and a cathodically shifted onset potential of 250 mV. This work provides an extremely simple method to improve the intrinsic photoelectrochemical performance of BiVO4 photoanodes.

Details

Title: Efficient BiVO4 Photoanodes by Postsynthetic Treatment: Remarkable Improvements in Photoelectrochemical Performance from Facile Borate Modification
Authors: Qijun Meng (Author) - KTH Royal Institute of Technology, Sweden
Biaobiao Zhang (Corresponding Author) - KTH Royal Institute of Technology, Sweden
Lizhou Fan (Author) - KTH Royal Institute of Technology, Sweden
Haidong Liu (Author) - Uppsala University, Sweden
Mario Valvo (Author) - Uppsala University, Sweden
Kristina Edstrom (Author) - Uppsala University, Sweden
Maria Cuartero (Author) - KTH Royal Institute of Technology, Sweden
Roland De Marco (Author) - University of the Sunshine Coast
Gaston A Crespo (Author) - KTH Royal Institute of Technology, Sweden
Licheng Sun (Author) - KTH Royal Institute of Technology, Sweden
Publication details: Angewandte Chemie, Vol.131(52), pp.19203-19209
Publisher: Wiley - V C H Verlag GmbH & Co. KGaA
Date published: 2019
DOI: 10.1002/anie.201911303
ISSN: 0044-8249
Organisation Unit: University of the Sunshine Coast, Queensland; Office of the Deputy Vice-Chancellor (Research and Innovation)
Language: English
Record Identifier: 99450657902621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Chemistry, Multidisciplinary