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Fabrication of a Cu 2 O/g‐C 3 N 4 /WS 2 Triple‐Layer Photocathode for Photoelectrochemical Hydrogen Evolution
Author(s) -
Xu Xintian,
Liu Yizhe,
Zhu Yuanzhi,
Fan Xiaobin,
Li Yang,
Zhang Fengbao,
Zhang Guoliang,
Peng Wenchao
Publication year - 2017
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201700014
Subject(s) - photocathode , photocurrent , materials science , water splitting , hydrogen , layer (electronics) , photoelectrochemistry , photoelectrochemical cell , electrochemistry , optoelectronics , chemistry , photocatalysis , catalysis , nanotechnology , electrode , electrolyte , physics , biochemistry , organic chemistry , quantum mechanics , electron
A Cu 2 O/g‐C 3 N 4 /WS 2 triple‐layer photocathode was fabricated by using a layer‐by‐layer assembly method for photoelectrochemical hydrogen evolution. Cu 2 O was electrodeposited on the FTO as the active layer for light harvesting. The chemically inert g‐C 3 N 4 can protect the unstable Cu 2 O layer and form a p‐n junction with Cu 2 O to increase the light‐to‐electricity conversion efficiency. Mixed‐phase WS 2 nanosheets were obtained through a lithium insertion method and used as an effective hydrogen evolution catalyst for photocurrent‐to‐hydrogen conversion. This photocathode is effective for photoelectrochemical hydrogen evolution, and a photocurrent of −9.5 mA cm −2 at −0.55 V versus RHE (pH 6.0) can be obtained under visible light ( λ ≥420 nm, 100 mW cm −2 ).
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