High-Resolution Electrochemical Mapping of the Hydrogen Evolution Reaction on Transition-Metal Dichalcogenide Nanosheets

被引：158

作者：

Takahashi, Yasufumi ^{[1
,2
]}

Kobayashi, Yu ^{[3
]}

Wang, Ziqian ^{[4
]}

Ito, Yoshikazu ^{[2
,5
]}

Ota, Masato ^{[1
]}

Ida, Hiroki ^{[6
]}

Kumatani, Akichika ^{[6
,7
]}

Miyazawa, Keisuke ^{[1
]}

Fujita, Takeshi ^{[8
]}

Shiku, Hitoshi ^{[9
]}

Korchev, Yuri E. ^{[1
,10
]}

Miyata, Yasumitsu ^{[3
]}

Fukuma, Takeshi ^{[1
]}

Chen, Mingwei ^{[4
,7
,11
]}

Matsue, Tomokazu ^{[6
,7
]}

机构：

[1] Kanazawa Univ, WPI Nano Life Sci Inst NanoLSI WPI, Kakuma Machi, Kanazawa, Ishikawa 9201192, Japan

[2] Japan Sci & Technol Agcy JST, Precursory Res Embryon Sci & Technol PRESTO, Saitama 3320012, Japan

[3] Tokyo Metropolitan Univ, Dept Phys, Hachioji, Tokyo 1920397, Japan

[4] Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA

[5] Univ Tsukuba, Grad Sch Pure & Appl Sci, Inst Appl Phys, Tsukuba, Ibaraki 3058573, Japan

[6] Tohoku Univ, Grad Sch Environm Studies, Aoba Ku, 6-6-11-604 Aramaki Aoba, Sendai, Miyagi 9808579, Japan

[7] Tohoku Univ, WPI Adv Inst Mat Res AIMR, Aoba Ku, 2-1-1-509 Katahira, Sendai, Miyagi 9808577, Japan

[8] Kochi Univ Technol, Sch Environm Sci & Engn, Kochi 7828502, Japan

[9] Tohoku Univ, Grad Sch Engn, Dept Appl Chem, Sendai, Miyagi 9808579, Japan

[10] Imperial Coll London, Dept Med, London W12 0NN, England

[11] Japan Sci & Technol Agcy JST, CREST, Kawaguchi, Saitama 3320012, Japan

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2020年 / 59卷 / 09期

基金：

日本科学技术振兴机构; 英国生物技术与生命科学研究理事会; 英国工程与自然科学研究理事会; 日本学术振兴会;

关键词：

electrochemistry; hydrogen evolution reaction; MoS2; scanning electrochemical cell microscopy; SULFUR VACANCIES; CATALYTIC-ACTIVITY; EDGE SITES; FEW-LAYER; MOS2; MICROSCOPY; GENERATION; FRONTIERS; PLANE; PHASE;

D O I：

10.1002/anie.201912863

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

High-resolution scanning electrochemical cell microscopy (SECCM) is used to image and quantitatively analyze the hydrogen evolution reaction (HER) catalytically active sites of 1H-MoS2 nanosheets, MoS2, and WS2 heteronanosheets. Using a 20 nm radius nanopipette and hopping mode scanning, the resolution of SECCM was beyond the optical microscopy limit and visualized a small triangular MoS2 nanosheet with a side length of ca. 130 nm. The electrochemical cell provides local cyclic voltammograms with a nanoscale spatial resolution for visualizing HER active sites as electrochemical images. The HER activity difference of edge, terrace, and heterojunction of MoS2 and WS2 were revealed. The SECCM imaging directly visualized the relationship of HER activity and number of MoS2 nanosheet layers and unveiled the heterogeneous aging state of MoS2 nanosheets. SECCM can be used for improving local HER activities by producing sulfur vacancies using electrochemical reaction at the selected region.

引用

页码：3601 / 3608

页数：8

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