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

Authors
Kim, Hee JunLee, Tae WonKim, Hye HyunYang, U. JeongKim, Chan UlChoi, Kyoung JinLee, HeonBaik, Jeong Min
Issue Date
7-6월-2020
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v.8, no.21, pp.10966 - 10972
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF MATERIALS CHEMISTRY A
Volume
8
Number
21
Start Page
10966
End Page
10972
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/55044
DOI
10.1039/d0ta00179a
ISSN
2050-7488
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 mu A cm(-2).
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Lee, Heon
공과대학 (신소재공학부)
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