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

Hee Jun Kim, Tae Won Lee, Hye Hyun Kim, U. Jeong Yang, Chan Ul Kim, Kyoung Jin Choi, Heon Lee, Jeong Min Baik

Research output: Contribution to journalArticlepeer-review

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/Ga2O3on 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 FeNiOxthin 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−2at 1.23 Vvs.RHE with a small dark current density of 16 μA cm−2

Original languageEnglish
Pages (from-to)10966-10972
Number of pages7
JournalJournal of Materials Chemistry A
Volume8
Issue number21
DOIs
Publication statusPublished - 2020 Jun 7

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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