Photocorrosion of plasmonic enhanced <strong>Cu<sub>x</sub>O</strong> photocatalyst

Chih-Ming Wang; Chun-Yu Wang

doi:10.1117/1.JNP.8.084095

Abstract

The photocatalytic water splitting using Cu_xO film on metallic structures under visible light illumination is investigated. A plasmonic enhanced layer is applied for high efficient light harvest and to form a heterojunction to prolong the lifetime of the photogenerated electron-hole pairs. Although Cu_xO is a potential photocatalyst with high efficiency, it suffers from serious photocorrosion. The photocorrosion mechanism of p-type Cu_xO has been investigated using x-ray photoelectron spectroscopy. Through analyzing the composition of Cu_xO during a photocatalytic water splitting reaction, it is found that the photocorrosion of Cu₂O on Pt is caused by the reduction of Cu₂O to Cu, while the photocorrosion of Cu₂O on Au is caused by the oxidation of Cu₂O to CuO.

Citation Download Citation

Chih-Ming Wang, Chih-Ming Wang, Chun-Yu Wang, Chun-Yu Wang, } "Photocorrosion of plasmonic enhanced Cu_xO photocatalyst," Journal of Nanophotonics 8(1), 084095 (15 July 2014). https://doi.org/10.1117/1.JNP.8.084095 . Submission:

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