Simultaneously Efficient Light Absorption and Charge Separation in WO3/BiVO4 Core/Shell Nanowire Photoanode for Photoelectrochemical Water Oxidation

We report a scalably synthesized WO3/BiVO4 core/shell nanowire photoanode in which BiVO4 is the primary light-absorber and WO3 acts as an electron conductor. These core/shell nanowires achieve the highest product of light absorption and charge separation efficiencies among BiVO4-based photoanodes to...

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Bibliographic Details
Published in:Nano letters 2014-02, Vol.14 (2), p.1099-1105
Main Authors: Rao, Pratap M, Cai, Lili, Liu, Chong, Cho, In Sun, Lee, Chi Hwan, Weisse, Jeffrey M, Yang, Peidong, Zheng, Xiaolin
Format: Article
Language:English
Subjects:
Catalytic methods
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Methods of nanofabrication
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Physics
Quantum wires
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Summary:We report a scalably synthesized WO3/BiVO4 core/shell nanowire photoanode in which BiVO4 is the primary light-absorber and WO3 acts as an electron conductor. These core/shell nanowires achieve the highest product of light absorption and charge separation efficiencies among BiVO4-based photoanodes to date and, even without an added catalyst, produce a photocurrent of 3.1 mA/cm2 under simulated sunlight and an incident photon-to-current conversion efficiency of ∼60% at 300–450 nm, both at a potential of 1.23 V versus RHE.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl500022z