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Oxygen Reduction Reaction Catalyzed by Self-Assembled Monolayers of Copper-Based Electrocatalysts on a Polycrystalline Gold Surface

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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)

Submitter: 加藤 優

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