Efficient Photoelectrochemical Hydrogen Generation Using Heterostructures of Si and Chemically Exfoliated Metallic MoS2

被引：376

作者：

Ding, Qi ^{[1
]}

Meng, Fei ^{[1
]}

English, Caroline R. ^{[1
]}

Caban-Acevedo, Miguel ^{[1
]}

Shearer, Melinda J. ^{[1
]}

Liang, Dong ^{[1
]}

Daniel, Andrew S. ^{[1
]}

Hamers, Robert J. ^{[1
]}

Jin, Song ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Chem, Madison, WI 53706 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2014年 / 136卷 / 24期

关键词：

SILICON PHOTOCATHODE; EVOLUTION; ELECTROCATALYSTS; CATALYST; PHOTOVOLTAGE; CONVERSION; NANOSHEETS; GRAPHENE; ABUNDANT; LAYERS;

D O I：

10.1021/ja5025673

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report the preparation and characterization of highly efficient and robust photocathodes based on heterostructures of chemically exfoliated metallic 1T-MoS2 and planar p-type Si for solar-driven hydrogen production. Photocurrents up to 17.6 mA/cm(2) at 0 V vs reversible hydrogen electrode were achieved under simulated 1 sun irradiation, and excellent stability was demonstrated over long-term operation. Electrochemical impedance spectroscopy revealed low charge-transfer resistances at the semiconductor/catalyst and catalyst/electrolyte interfaces, and surface photoresponse measurements also demonstrated slow carrier recombination dynamics and consequently efficient charge carrier separation, providing further evidence for the superior performance. Our results suggest that chemically exfoliated 1T-MoS2/Si heterostructures are promising earth-abundant alternatives to photocathodes based on noble metal catalysts for solar-driven hydrogen production.

引用

页码：8504 / 8507

页数：4

共 41 条

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