| Title: | Incorporation of Multinuclear Copper Active Sites into Nitrogen-Doped Graphene for Electrochemical Oxygen Reduction |
| Authors: | Kato, Masaru Browse this author →KAKEN DB |
| Muto, Marika Browse this author |
| Matsubara, Naohiro Browse this author |
| Uemura, Yohei Browse this author →KAKEN DB |
| Wakisaka, Yuki Browse this author |
| Yoneuchi, Tsubasa Browse this author |
| Matsumura, Daiju Browse this author →KAKEN DB |
| Ishihara, Tomoko Browse this author |
| Tokushima, Takashi Browse this author →KAKEN DB |
| Noro, Shin-ichiro Browse this author →KAKEN DB |
| Takakusagi, Satoru Browse this author →KAKEN DB |
| Asakura, Kiyotaka Browse this author →KAKEN DB |
| Yagi, Ichizo Browse this author →KAKEN DB |
| Keywords: | Oxygen reduction reaction |
| Polymer electrolyte fuel cell |
| Electrocatalysts |
| Nitrogen-doped graphene |
| Metalloenzymes |
| Issue Date: | 29-May-2018 |
| Publisher: | American Chemical Society |
| Journal Title: | ACS Applied Energy Materials |
| Volume: | 1 |
| Issue: | 5 |
| Start Page: | 2358 |
| End Page: | 2364 |
| Publisher DOI: | 10.1021/acsaem.8b00491 |
| Abstract: | Multinuclear metal active sites are widely used as catalytic reaction centers in metalloenzymes and generally show high catalytic activity. For example, laccases are known to catalyze the oxygen reduction reaction (ORR) to water at a multinuclear copper site with almost no energy loss. The ORR is an important reaction not only in oxygenic respiration but also in future energy generation devices such as polymer electrolyte fuel cells and metal–air batteries. For large-scale commercialization of these devices, there is a need to develop highly active ORR electrocatalysts based on non-precious metals. Incorporation of multinuclear metal active sites in conductive materials such as carbon will allow us to develop highly active electrocatalysts like metalloenzymes. However, such methods had not been established yet. Herein, we report a copper-based ORR electrocatalysts with multinuclear copper active sites in nitrogen-doped graphene. The electrocatalyst was synthesized from the mixture of graphene oxide and a multinuclear copper complex in a short-period heating method. Electrochemical measurements revealed that the obtained electrocatalyst showed the highest electrocatalytic activity for the ORR in the Cu-based electrocatalysts in neutral aqueous solution. Physicochemical measurements including in situ X-ray absorption spectroscopy revealed the incorporation of multinuclear copper sites. Our synthetic approach will offer guidance for developing highly active electrocatalysts utilizing multinuclear metal sites not only for the ORR but also for other electrocatalytic reactions. |
| Rights: | This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Energy Materials, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsaem.8b00491. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/79352 |
| 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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