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

Title
Design of an amorphous TaOx multifunctional interfacial layer on photoelectrodes for photoelectrochemical H2 evolution
Authors
주오심채상윤김수민
Keywords
Photoelctrochemical cell; water splitting; H2; TaOx
Issue Date
2019-02
Publisher
Journal of materials chemistry. A, Materials for energy and sustainability
Citation
VOL 7, NO 5-2047
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.
URI
http://pubs.kist.re.kr/handle/201004/69009
ISSN
2050-7488
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE