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Oxygen Reduction Reaction Catalyzed by Self-Assembled Monolayers of Copper-Based Electrocatalysts on a Polycrystalline Gold Surface
| Title: | Oxygen Reduction Reaction Catalyzed by Self-Assembled Monolayers of Copper-Based Electrocatalysts on a Polycrystalline Gold Surface |
| Authors: | Kato, Masaru Browse this author →KAKEN DB | | Oyaizu, Nobuhisa Browse this author | | Shimazu, Katsuaki Browse this author →KAKEN DB | | Yagi, Ichizo Browse this author →KAKEN DB |
| Keywords: | Oxygen reduction reaction | | copper complex | | polymer electrolyte fuel cells | | proton exchange membrane fuel cells | | self-assembled monolayers | | sum frequency generation spectroscopy |
| Issue Date: | 28-Jul-2016 |
| Publisher: | American Chemical Society |
| Journal Title: | The Journal of Physical Chemistry C |
| Volume: | 120 |
| Issue: | 29 |
| Start Page: | 15814 |
| End Page: | 15822 |
| Publisher DOI: | 10.1021/acs.jpcc.5b11663 |
| Abstract: | We report two-dimensional model systems to study the electrocatalytic activities of dinuclear copper complexes for various electrocatalytic reactions including the oxygen reduction reaction (ORR), where we can use electrochemical techniques as well as surface-sensitive techniques such as X-ray photoelectron spectroscopy and vibrational sum frequency generation spectroscopy. Heteroaromatic thiols, including four triazoles and a thiadiazole, are used as metal ligands as well as anchors to a polycrystalline gold electrode. The thiols are self-assembled on the polycrystalline gold electrode and then react with copper(II) ions to give monolayers of copper-based ORR catalysts on the surface. The dinuclear copper complexes of 1,2,4-triazole-3-thiol and 3-amino-1,2,4-triazole-5-thiol show ORR activity and pH-dependent catalytic behavior similar to that of counterparts supported on carbon black, suggesting that our two-dimensional systems can serve as model catalysts for carbon-supported molecular catalysts. We have also self-assembled dinuclear copper complexes with long alkyl or perfluoroalkyl chains on the surface and studied their orientation on the surface and oxygen transport. |
| Rights: | This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry C, 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/acs.jpcc.5b11663. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/79353 |
| 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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Submitter: 加藤 優
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