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Issue 38, 2013
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WO3–reduced graphene oxide composites with enhanced charge transfer for photoelectrochemical conversion

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Abstract

Hybrid structures between semiconducting metal oxides and carbon with rational synthesis represent unique device building blocks to optimize the light absorption and charge transfer process for the photoelectrochemical conversion. Here we demonstrate the realization of a WO3–reduced graphene oxide (RGO) nanocomposite via hydrothermal growth of ultrathin WO3 nanoplates directly on fluorine-doped tin oxide (FTO) substrates, followed by in situ photo-reduction to deposit RGO layers on WO3 nanoplate surface. Photoanodes made of the WO3–RGO nanocomposites have achieved a photocurrent density of 2.0 mA cm−2 at 1.23 V vs. reversible hydrogen electrode (RHE), which is among the highest reported values for photoanodes based on hydrothermally grown WO3. Electrochemical impedance spectroscopy reveals that the increase of photoactivity is attributed to the enhanced charge transfer by the incorporation of RGO, thus suggesting a general approach for designing other metal oxide–RGO hybrid architectures.

Graphical abstract: WO3–reduced graphene oxide composites with enhanced charge transfer for photoelectrochemical conversion

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Supplementary files

Article information


Submitted
19 Jul 2013
Accepted
24 Jul 2013
First published
31 Jul 2013

Phys. Chem. Chem. Phys., 2013,15, 16138-16142
Article type
Paper

WO3–reduced graphene oxide composites with enhanced charge transfer for photoelectrochemical conversion

H. Wu, M. Xu, P. Da, W. Li, D. Jia and G. Zheng, Phys. Chem. Chem. Phys., 2013, 15, 16138
DOI: 10.1039/C3CP53051E

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