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Site-Selective Deposition of a Cobalt Cocatalyst onto a Plasmonic Au/TiO2 Photoanode for Improved Water Oxidation

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Title: Site-Selective Deposition of a Cobalt Cocatalyst onto a Plasmonic Au/TiO2 Photoanode for Improved Water Oxidation
Authors: Okazaki, Megumi Browse this author
Suganami, Yoshiki Browse this author
Hirayama, Naoki Browse this author
Nakata, Hiroko Browse this author
Oshikiri, Tomoya Browse this author →KAKEN DB
Yokoi, Toshiyuki Browse this author
Misawa, Hiroaki Browse this author →KAKEN DB
Maeda, Kazuhiko Browse this author
Keywords: artificial photosynthesis
localized surface plasmon
solar fuels
water splitting
Issue Date: 22-Jun-2020
Publisher: American Chemical Society
Journal Title: ACS applied energy materials
Volume: 3
Issue: 6
Start Page: 5142
End Page: 5146
Publisher DOI: 10.1021/acsaem.0c00857
Abstract: Plasmonic Au/TiO2 thin film works as a stable water oxidation photoanode. Here we show that site-selective deposition of nanosized CoOx as a water oxidation cocatalyst at the edge of Au nanoparticles on the TiO2 film improves the photoelectrochemical water oxidation activity. The nanosized CoOx was deposited by a photoassisted electrochemical method onto the Au/TiO2 thin film. The CoOx loading amount was controllable by changing the amount of electric charge that flowed during the deposition, which influenced the photoelectrochemical performance. Under visible light, the optimized CoOx/Au/TiO2 thin film generated stable photoanodic current, which was similar to 3 times higher than that obtained using Au/TiO2.
Type: article
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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