Ag2S/Ag Heterostructure: A Promising Electrocatalyst for the Hydrogen Evolution Reaction

被引：98

作者：

Basu, Mrinmoyee ^{[1
]}

Nazir, Roshan ^{[1
]}

Mahala, Chavi ^{[1
]}

Fageria, Pragati ^{[1
]}

Chaudhary, Sumita ^{[2
]}

Gangopadhyay, Subhashis ^{[2
]}

Pande, Surojit ^{[1
]}

机构：

[1] BITS Pilani, Dept Chem, Pilani 333031, Rajasthan, India

[2] BITS Pilani, Dept Phys, Pilani 333031, Rajasthan, India

来源：

LANGMUIR | 2017年 / 33卷 / 13期

关键词：

FACILE FABRICATION; WATER; EFFICIENT; CATALYST; NANOPARTICLES; ARRAYS; MOS2; DEGRADATION; NANOSHEETS; NANOTUBES;

D O I：

10.1021/acs.langmuir.7b00029

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Different metal chalcogenides, being a potential candidate for hydrogen evolution catalysts, have attracted enormous attention in the field of water splitting. In the present study, Ag2S/Ag is revealed as an efficient catalyst for hydrogen evolution. When a sacrificial template of the CuS nanostructure is used, Ag2S/Ag heterostructures are synthesized following a simple wet chemical technique.. Two different routes, wet chemical and hydrothermal, are followed to modulate the morphology of the CuS templates from flower ball to wirelike structures, which subsequently results in the formation of Ag2S nanostructure. Finally, the Ag layer is deposited on Ag2S with the help of a photoreduction technique. The unique heterostructure of Ag2S/Ag shows efficient catalytic activity in the H-2, evolution reaction. A Ag2S/Ag wire can successfully generate a 10 mA/cm(2) current density at a -0.199 V potential. Ag2S/Ag contains the micronanostructure where nanoplates of Ag2S/Ag assemble to give rise to microstructures such as flower balls and wire.

引用

页码：3178 / 3186

页数：9

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