Jump to main content
Jump to site search


Design of an amorphous TaOx multifunctional interfacial layer on photocathodes for photoelectrochemical H2 evolution

Author affiliations

Abstract

A novel TaOx multifunctional layer which is transparent and co-catalytically active was applied to photoelectrodes for hydrogen production. We found that amorphous TaOx was in situ transformed into amorphous TaOx/Ta(OH)x in the photoelectrochemical reaction, which is a more active form for hydrogen evolution. The TaOx/Ta(OH)x multifunctional layer enhanced not only charge separation but also stability and HER kinetics when it was deposited on a p-type CuInS2 model photocathode. The new band alignment and the widened depletion region of CuInS2/TaOx were revealed by electrochemical impedance spectroscopy and IPCE analysis. The TaOx deposited CuInS2 photocathode shows a higher photocurrent at −0.3 V vs. RHE compared to CuInS2 or even Pt-decorated CuInS2. A novel multifunctional layer was successfully designed and demonstrated for photocathodes without noble metals, which can minimize the structure of photoelectrodes.

Graphical abstract: Design of an amorphous TaOx multifunctional interfacial layer on photocathodes for photoelectrochemical H2 evolution

Back to tab navigation

Supplementary files

Publication details

The article was received on 07 Nov 2018, accepted on 18 Dec 2018 and first published on 19 Dec 2018


Article type: Paper
DOI: 10.1039/C8TA10738F
Citation: J. Mater. Chem. A, 2019, Advance Article
  •   Request permissions

    Design of an amorphous TaOx multifunctional interfacial layer on photocathodes for photoelectrochemical H2 evolution

    S. Y. Chae, S. Kim and O. Joo, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C8TA10738F

Search articles by author

Spotlight

Advertisements