Highly active deficient ternary sulfide photoanode for photoelectrochemical water splitting

Haimei Wang, Yuguo Xia (), Haiping Li, Xiang Wang, Yuan Yu, Xiuling Jiao and Dairong Chen ()
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Haimei Wang: Shandong University
Yuguo Xia: Shandong University
Haiping Li: Shandong University
Xiang Wang: Shandong University
Yuan Yu: Shandong University
Xiuling Jiao: Shandong University
Dairong Chen: Shandong University

Nature Communications, 2020, vol. 11, issue 1, 1-11

Abstract: Abstract The exploration of photoanode materials with high efficiency and stability is the eternal pursuit for the realization of practically solar-driven photoelectrochemical (PEC) water splitting. Here we develop a deficient ternary metal sulfide (CdIn2S4) photoanode, and its PEC performance is significantly enhanced by introducing surface sulfur vacancies, achieving a photocurrent density of 5.73 mA cm−2 at 1.23 V vs. RHE and 1 Sun with an applied bias photon-to-current efficiency of 2.49% at 0.477 V vs. RHE. The experimental characterizations and theoretical calculations highlight the enhanced effect of surface sulfur vacancies on the interfacial charge separation and transfer kinetics, which also demonstrate the restrained surface states distribution and the transformation of active sites after introducing surface sulfur vacancies. This work may inspire more excellent work on developing sulfide-based photoanodes.

Date: 2020
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DOI: 10.1038/s41467-020-16800-w

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