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Electrocatalytic Hydrogen Evolution Reaction Promoted by Co/N/C Catalysts with Co-N-x Active Sites Derived from Precursors Forming N-Doped Graphene Nanoribbons
| Title: | Electrocatalytic Hydrogen Evolution Reaction Promoted by Co/N/C Catalysts with Co-N-x Active Sites Derived from Precursors Forming N-Doped Graphene Nanoribbons |
| Authors: | Matsumoto, Koki Browse this author | | Onoda, Akira Browse this author →KAKEN DB | | Campidell, Stephane Browse this author | | Hayashi, Takashi Browse this author →KAKEN DB |
| Keywords: | Hydrogen evolution reaction | | Co/N/C catalyst | | Nitrogen-doped graphene nanoribbon |
| Issue Date: | Dec-2021 |
| Publisher: | 日本化学会（Chemical Society of Japan） |
| Journal Title: | Bulletin of the Chemical Society of Japan |
| Volume: | 94 |
| Issue: | 12 |
| Start Page: | 2898 |
| End Page: | 2905 |
| Publisher DOI: | 10.1246/bcsj.20210302 |
| Abstract: | Cobalt and nitrogen co-doped carbon (Co/N/C) catalysts prepared by pyrolysis are promising electrocatalysts for hydrogen evolution reaction (HER). Construction of Co-N-x active sites is an important strategy for improving HER activity. We developed a method for thermally controlled construction of the Co-N-x active sites by applying a bottom-up synthetic methodology using an N-doped graphene nanoribbon (N-GNR). Preorganized aromatic rings in the precursors assist graphitization during generation of N-GNR which has N2 sites that coordinate to a cobalt ion. Atomically dispersed Co-N-x sites in the catalysts are observed by electron microscopy. Moreover, the amount of Co-N-x sites increases up to 0.31 wt% as confirmed by XPS and elemental analysis. The Co/N/C catalyst prepared from the precisely designed precursor forming an NGNR shows HER activity with a low overpotential of 258mV (in 1.0M HClO4aq) and 311mV (in 0.1M HClO4aq) at 10 mA.cm(-2), and with a long-term stability. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/84561 |
| Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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