Conducting MoS2 Nanosheets as Catalysts for Hydrogen Evolution Reaction

被引：1970

作者：

Voiry, Damien ^{[1
]}

Salehi, Maryam ^{[1
]}

Silva, Rafael ^{[2
]}

Fujita, Takeshi ^{[3
,4
]}

Chen, Mingwei ^{[3
]}

Asefa, Tewodros ^{[2
,5
]}

Shenoy, Vivek B. ^{[6
]}

Eda, Goki ^{[7
,8
,9
]}

Chhowalla, Manish ^{[1
]}

机构：

[1] Rutgers State Univ, Piscataway, NJ 08854 USA

[2] Rutgers State Univ, Dept Chem & Chem Biol, Piscataway, NJ 08854 USA

[3] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan

[4] JST, PRESTO, Kawaguchi, Saitama 3320012, Japan

[5] Rutgers State Univ, Dept Chem & Biochem Engn, Piscataway, NJ 08854 USA

[6] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

[7] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

[8] Natl Univ Singapore, Graphene Res Ctr, Singapore 117542, Singapore

[9] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore

来源：

NANO LETTERS | 2013年 / 13卷 / 12期

基金：

美国国家科学基金会;

关键词：

Layered materials; MoS2; chemical exfoliation; layered transition metal dichalcogenide; hydrogen evolution reaction; SINGLE-LAYER MOS2; TRANSITION-METAL DICHALCOGENIDES; ACTIVE EDGE SITES; MONOLAYER MOS2; ELECTROCATALYTIC MATERIALS; MOLYBDENUM-DISULFIDE; GRAPHENE; WS2; PHOTOLUMINESCENCE; PHOTOTRANSISTORS;

D O I：

10.1021/nl403661s

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report chemically exfoliated MoS2 nanosheets with a very high concentration of metallic 1T phase using a solvent free intercalation method. After removing the excess of negative charges from the surface of the nanosheets, highly conducting IT phase MoS2 nanosheets exhibit excellent catalytic activity toward the evolution of hydrogen with a notably low Tafel slope of 40 mV/dec. By partially oxidizing MoS2, we found that the activity of 2H MoS2 is significantly reduced after oxidation, consistent with edge oxidation. On the other hand, IT MoS2 remains unaffected after oxidation, suggesting that edges of the nanosheets are not the main active sites. The importance of electrical conductivity of the two phases on the hydrogen evolution reaction activity has been further confirmed by using carbon nanotubes to increase the conductivity of 2H MoS2.

引用

页码：6222 / 6227

页数：6

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