CuInS2/Sb2S3 heterostructure modified with noble metal co-catalyst for efficient photoelectrochemical water splitting

被引：93

作者：

Cai, Qijun ^{[1
,2
]}

Liu, Zhifeng ^{[1
,2
]}

Han, Changcun ^{[1
,2
]}

Tong, Zhengfu ^{[1
,2
]}

Ma, Chonghao ^{[1
,2
]}

机构：

[1] Hubei Univ Technol, Hubei Collaborat Innovat Ctr High Efficiency Util, Wuhan 430068, Hubei, Peoples R China

[2] Hubei Univ Technol, Sch Sci, Wuhan 430068, Hubei, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 795卷

基金：

美国国家科学基金会;

关键词：

CuInS2; Sb2S3; Heterostructure; Co-catalyst; Photoelctrochemical water splitting; PHOTOCATALYTIC HYDROGEN-PRODUCTION; DOPED TIO2; HETEROJUNCTION; PERFORMANCE; PHOTOCATHODES; SB2S3; NANOSTRUCTURES; NANOPARTICLES; CONSTRUCTION; DEGRADATION;

D O I：

10.1016/j.jallcom.2019.04.312

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In order to improve the water splitting efficiency of CuInS2 in a photoelectrochemical (PEC) cell, the novel CuInS2/Sb2S3 heterostructure photocathodes modified with Pt noble metal co-catalyst were prepared on the ITO substrate by the hydrothermal and electrochemical deposition method for the first time. The mechanism of the synthesis reaction for the CuInS2/Sb2S3 and CuInS2/Sb2S3/Pt were investigated. With the photoelectrochemical measurements, the photocurrent density of CuInS2/Sb2S3/Pt photoelectrode (-2.48 mA/cm(2) at -0.6 V vs. RHE) is about 3.13 times relatively higher than that of the corresponding the pure CuInS2 photoelectrode (-0.79 mA/cm(2) at -0.6 V vs. RHE). The excellent PEC behaviors profit from the modification by Sb2S3 that forms the heterostructure which broadens the response of visible light and increases the separation and transfer of photo-generated carriers. Moreover, after introducing Pt co-catalyst onto the surface of CuInS2/Sb2S3 photoelectrode, photo-generated electrons can be captured quickly which further effectively promotes the separation of photo-generated carriers and greatly improve the PEC performance. This work manifests that the structure of CuInS2/Sb2S3/Pt photocathodes has a guiding suggestion to provide a promising approach to designing a highly stabilized efficient device for photoelectrochemical water splitting. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：319 / 326

页数：8

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