Jump to main content
Jump to site search


Exposing the photocorrosion mechanism and control strategies of a CuO photocathode

Author affiliations

Abstract

Photocorrosion is regarded as an important limitation of cupric oxide (CuO) for application in photocatalysis and photoelectrocatalysis. In this paper, we firstly explore the photocorrosion mechanism of a CuO photocathode in the photoelectrocatalysis field and reveal that self-reduction of CuO caused by photogenerated electrons is a prime factor for the photocorrosion of the CuO photocathode. Aiming to solve this issue, TiO2 is introduced on the surface of CuO to form a suitable gradient band level, which is conducive to the fast export of photo-induced electrons in the bulk of CuO. Besides, a Pt cocatalyst as an electron capture layer (ECL) is selected to load on top of the CuO/TiO2 photoelectrode, further promoting the transport of electrons, thereby improving the photocorrosion stability of the CuO photocathode. Under the synergistic effect of TiO2 and Pt, the CuO/TiO2/Pt photocathode in photoelectrochemical water splitting exhibits a photocurrent density of −0.75 mA cm−2 at −0.55 V vs. Ag/AgCl and a photocorrosion stability of 84% after the stability test for 2 h. This work not only reveals the photocorrosion mechanism of the CuO photocathode, but also offers a new method for improving the photocorrosion stability of photocathodes.

Graphical abstract: Exposing the photocorrosion mechanism and control strategies of a CuO photocathode

Back to tab navigation

Supplementary files

Publication details

The article was received on 27 Jun 2019, accepted on 25 Jul 2019 and first published on 29 Jul 2019


Article type: Research Article
DOI: 10.1039/C9QI00780F
Inorg. Chem. Front., 2019, Advance Article

  •   Request permissions

    Exposing the photocorrosion mechanism and control strategies of a CuO photocathode

    H. Xing, L. E, Z. Guo, D. Zhao, X. Li and Z. Liu, Inorg. Chem. Front., 2019, Advance Article , DOI: 10.1039/C9QI00780F

Search articles by author

Spotlight

Advertisements