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Photoelectrochemical Response of WO3/Nanoporous Carbon Anodes for Photocatalytic Water Oxidation

1
POR2E Group, CEMHTI, CNRS (UPR 3079), Université d’Orléans, 45071 Orléans, France
2
Institute of Electrochemistry, Faculty of Science, Univ. Alicante, 03080 Alicante, Spain
3
School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, UK
*
Authors to whom correspondence should be addressed.
Received: 1 June 2018 / Revised: 27 July 2018 / Accepted: 1 August 2018 / Published: 10 August 2018
(This article belongs to the Special Issue Carbon-Based Catalyst)
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Abstract

This work demonstrates the ability of nanoporous carbons to boost the photoelectrochemical activity of hexagonal and monoclinic WO3 towards water oxidation under irradiation. The impact of the carbonaceous phase was strongly dependent on the crystalline structure and morphology of the semiconductor, substantially increasing the activity of WO3 rods with hexagonal phase. The incorporation of increasing amounts of a nanoporous carbon of low functionalization to the WO3 electrodes improved the quantum yield of the reaction and also affected the dynamics of the charge transport, creating a percolation path for the majority carriers. The nanoporous carbon promotes the delocalization of the charge carriers through the graphitic layers. We discuss the incorporation of nanoporous carbons as an interesting strategy for improving the photoelectrochemical performance of nanostructured semiconductor photoelectrodes featuring hindered carrier transport. View Full-Text
Keywords: WO3/nanoporous carbon photoanodes; water oxidation; photoelectrochemistry WO3/nanoporous carbon photoanodes; water oxidation; photoelectrochemistry
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Gomis-Berenguer, A.; Iniesta, J.; Fermín, D.J.; Ania, C.O. Photoelectrochemical Response of WO3/Nanoporous Carbon Anodes for Photocatalytic Water Oxidation. C 2018, 4, 45.

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