DataVXACS Applied Energy MaterialsPaper
journal article·2020-06-22Open access

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

Megumi Okazaki, Yoshiki Suganami, Naoki Hirayama, Hiroko Nakata, Tomoya Oshikiri, Toshiyuki Yokoi, Hiroaki Misawa, Kazuhiko Maeda

ACS Applied Energy Materials· Volume 3· Issue 6
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Source abstract

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 ∼3 times higher than that obtained using Au/TiO2.
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Research context

NanomaterialsMaterials processing

OpenAlex topics: Advanced Photocatalysis Techniques · Copper-based nanomaterials and applications · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan

Japan Society for the Promotion of Science, Kojimachi Business Center Building, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo 102-0083, Japan

Research Institute for Electronic Science, Hokkaido University, North-21 West-10, Kita-ku, Sapporo 001-0021, Japan

Nanospace Catalysis Unit, Institute of Innovative Research, Tokyo Institute of Technology, 4259-S2-5, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan

Center for Emergent Functional Matter Science, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 30010, Taiwan

Funding

Hokkaido University · Ministry of Education, Culture, Sports, Science and Technology · Japan Society for the Promotion of Science

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