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クマタニ アキチカ
Akichika Kumatani
熊谷 明哉 所属 千葉工業大学 工学部 電気電子工学科 千葉工業大学 工学研究科 工学専攻 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2020/02/24 |
| 形態種別 | 学術雑誌 |
| 査読 | 査読あり |
| 標題 | High-Resolution Electrochemical Mapping of the Hydrogen Evolution Reaction on Transition-Metal Dichalcogenide Nanosheets |
| 執筆形態 | 共著 |
| 掲載誌名 | Angewandte Chemie - International Edition |
| 掲載区分 | 国外 |
| 巻・号・頁 | 59(9),pp.3601-3608 |
| 国際共著 | 国際共著 |
| 著者・共著者 | Yasufumi Takahashi,Yu Kobayashi,Ziqian Wang,Yoshikazu Ito,Masato Ota,Hiroki Ida,Akichika Kumatani,Keisuke Miyazawa,Takeshi Fujita,Hitoshi Shiku,Yuri E. Korchev,Yasumitsu Miyata,Takeshi Fukuma,Mingwei Chen,Tomokazu Matsue |
| 概要 | 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. |
| DOI | 10.1002/anie.201912863 |
| ISSN | 1433-7851/1521-3773 |
| PMID | 31777142 |