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Controllable proton and CO2 photoreduction over Cu2O with various morphologies

Handoko, AD; Tang, J; (2013) Controllable proton and CO2 photoreduction over Cu2O with various morphologies. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 38 (29) 13017 - 13022. 10.1016/j.ijhydene.2013.03.128. Green open access

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Abstract

Simultaneous photocatalytic reduction of water to H2 and CO2 to CO was observed over Cu2O photocatalyst under both full arc and visible light irradiation (>420 nm). It was found that the photocatalytic reduction preference shifts from H2 (water splitting) to CO (CO2 reduction) by controlling the exposed facets of Cu2O. More interestingly, the low index facets of Cu2O exhibit higher activity for CO2 photoreduction than high index facets, which is different from the widely-reported in which the facets with high Miller indices would show higher photoactivity. Improved CO conversion yield could be further achieved by coupling the Cu2O with RuOx to form a heterojunction which slows down fast charge recombination and relatively stabilises the Cu2O photocatalyst. The RuOx amount was also optimised to maximise the junction's photoactivity.

Type: Article
Title: Controllable proton and CO2 photoreduction over Cu2O with various morphologies
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.ijhydene.2013.03.128
Publisher version: http://dx.doi.org/10.1016/j.ijhydene.2013.03.128
Additional information: © 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. This work is licensed under a Creative Commons Attribution 3.0 Unported License.
Keywords: Solar energy, CO2 reduction, Cu2O photocatalyst, Heterojunction
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1409904
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