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Chemical Dopants on Edge of Holey Graphene Accelerate Electrochemical Hydrogen Evolution Reaction
http://hdl.handle.net/2241/00157086
http://hdl.handle.net/2241/00157086baa93100-ee84-4dd2-8d6a-4e0a7ec0631a
名前 / ファイル | ライセンス | アクション |
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AS_6-1900119 (2.4 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2019-07-11 | |||||
タイトル | ||||||
タイトル | Chemical Dopants on Edge of Holey Graphene Accelerate Electrochemical Hydrogen Evolution Reaction | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
藤田, 淳一
× 藤田, 淳一× 伊藤, 良一× Kumatani, Akichika× Miura, Chiho× Kuramochi, Hirotaka× Ohto, Tatsuhiko× Wakisaka, Mitsuru× Nagata, Yuki× Ida, Hiroki× Takahashi, Yasufumi× Hu, Kailong× Jeong, Samuel× Matsue, Tomokazu |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Carbon‐based metal‐free catalysts for the hydrogen evolution reaction (HER) are essential for the development of a sustainable hydrogen society. Identification of the active sites in heterogeneous catalysis is key for the rational design of low‐cost and efficient catalysts. Here, by fabricating holey graphene with chemically dopants, the atomic‐level mechanism for accelerating HER by chemical dopants is unveiled, through elemental mapping with atomistic characterizations, scanning electrochemical cell microscopy (SECCM), and density functional theory (DFT) calculations. It is found that the synergetic effects of two important factors—edge structure of graphene and nitrogen/phosphorous codoping—enhance HER activity. SECCM evidences that graphene edges with chemical dopants are electrochemically very active. Indeed, DFT calculation suggests that the pyridinic nitrogen atom could be the catalytically active sites. The HER activity is enhanced due to phosphorus dopants, because phosphorus dopants promote the charge accumulations on the catalytically active nitrogen atoms. These findings pave a path for engineering the edge structure of graphene in graphene‐based catalysts. | |||||
書誌情報 |
Advanced Science 巻 6, 号 10, p. 1900119, 発行日 2019-04 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2198-3844 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1002/advs.201900119 | |||||
権利 | ||||||
権利情報 | © 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. | |||||
著者版フラグ | ||||||
値 | publisher | |||||
出版者 | ||||||
出版者 | WILEY |