Embedding laser generated nanocrystals in BiVO4 photoanode for efficient photoelectrochemical water splitting

Jie Jian, Youxun Xu, Xiaokun Yang, Wei Liu, Maosen Fu, Huiwu Yu, Fei Xu, Fan Feng, Lichao Jia, Dennis Friedrich, Roel van de Krol and Hongqiang Wang ()
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Jie Jian: Northwestern Polytechnical University and Shaanxi Joint Labortary of Graphene
Youxun Xu: Northwestern Polytechnical University and Shaanxi Joint Labortary of Graphene
Xiaokun Yang: Northwestern Polytechnical University and Shaanxi Joint Labortary of Graphene
Wei Liu: Northwestern Polytechnical University and Shaanxi Joint Labortary of Graphene
Maosen Fu: Northwestern Polytechnical University and Shaanxi Joint Labortary of Graphene
Huiwu Yu: Northwestern Polytechnical University and Shaanxi Joint Labortary of Graphene
Fei Xu: Northwestern Polytechnical University and Shaanxi Joint Labortary of Graphene
Fan Feng: Shaanxi Normal University
Lichao Jia: Shaanxi Normal University
Dennis Friedrich: Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
Roel van de Krol: Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
Hongqiang Wang: Northwestern Polytechnical University and Shaanxi Joint Labortary of Graphene

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract Addressing the intrinsic charge transport limitation of metal oxides has been of significance for pursuing viable PEC water splitting photoelectrodes. Growing a photoelectrode with conductive nanoobjects embedded in the matrix is promising for enhanced charge transport but remains a challenge technically. We herein show a strategy of embedding laser generated nanocrystals in BiVO4 photoanode matrix, which achieves photocurrent densities of up to 5.15 mA cm−2 at 1.23 VRHE (from original 4.01 mA cm−2) for a single photoanode configuration, and 6.22 mA cm−2 at 1.23 VRHE for a dual configuration. The enhanced performance by such embedding is found universal owing to the typical features of laser synthesis and processing of colloids (LSPC) for producing ligand free nanocrystals in desired solvents. This study provides an alternative to address the slow bulk charge transport that bothers most metal oxides, and thus is significant for boosting their PEC water splitting performance.

Date: 2019
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DOI: 10.1038/s41467-019-10543-z

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