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An integrating photoanode consisting of BiVO4, rGO and LDH for photoelectrochemical water splitting

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Abstract

The low carrier mobility of BiVO4 is a bottleneck that limits its charge transfer in bulk or on the surface. Herein, reduced graphene oxide (rGO) nanosheets as an effective electron mediator were successfully loaded on BiVO4 and NiFe-layered double hydroxides (NiFe-LDHs) were decorated on BiVO4/rGO heterojunctions by two facile electrodeposition methods to construct a triadic photoanode of BiVO4/rGO/NiFe-LDH for improvement of photoelectrochemical (PEC) water splitting efficiency of BiVO4. This photoanode significantly extends the absorption region of visible light, increases the photocurrent density, exhibits an onset potential with a significant cathodic shift, and enhances photon-to-electron conversion efficiency (IPCE) compared with the pristine BiVO4 photoanode. The enhancement of PEC properties benefits from the formation of p–n heterojunctions between rGO and BiVO4 and the use of NiFe-LDH as a cocatalyst for accelerating the kinetics of oxygen evolution from water.

Graphical abstract: An integrating photoanode consisting of BiVO4, rGO and LDH for photoelectrochemical water splitting

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Publication details

The article was received on 30 Apr 2019, accepted on 02 Sep 2019 and first published on 06 Sep 2019


Article type: Paper
DOI: 10.1039/C9DT01819K
Dalton Trans., 2019, Advance Article

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    An integrating photoanode consisting of BiVO4, rGO and LDH for photoelectrochemical water splitting

    L. Sun, J. Sun, X. Yang, S. Bai, Y. Feng, R. Luo, D. Li and A. Chen, Dalton Trans., 2019, Advance Article , DOI: 10.1039/C9DT01819K

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