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Issue 21, 2020
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Triple layered Ga2O3/Cu2O/Au photoanodes with enhanced photoactivity and stability prepared using iron nickel oxide catalysts

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Abstract

In this study, the photoelectrochemical performance of Cu2O-based photoanodes is evaluated in terms of photoactivity and stability. The electrodes are based on the p–n junction consisting of Cu2O/Ga2O3, on which an Au layer is deposited, followed by the formation of Ni-based co-catalysts. The Au layer increases the light absorption in the entire wavelength range from 300 to 800 nm and leads to upward band bending at the Cu2O/Au interface; thus, more photogenerated hole charges are transported to the electrolytes. The electrodeposited FeNiOx thin layer significantly decreases the overpotential and increases the photoactivity; thus, the photoelectrochemical cell consisting of the Cu2O-based photoanode and platinum yields a photocurrent density of about 5.15 mA cm−2 at 1.23 V vs. RHE with a small dark current density of 16 μA cm−2.

Graphical abstract: Triple layered Ga2O3/Cu2O/Au photoanodes with enhanced photoactivity and stability prepared using iron nickel oxide catalysts

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Supplementary files

Article information


Submitted
06 Jan 2020
Accepted
22 Apr 2020
First published
24 Apr 2020

J. Mater. Chem. A, 2020,8, 10966-10972
Article type
Paper

Triple layered Ga2O3/Cu2O/Au photoanodes with enhanced photoactivity and stability prepared using iron nickel oxide catalysts

H. J. Kim, T. W. Lee, H. H. Kim, U. J. Yang, C. U. Kim, K. J. Choi, H. Lee and J. M. Baik, J. Mater. Chem. A, 2020, 8, 10966
DOI: 10.1039/D0TA00179A

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