Perovskite Oxide Nanosheets with Tunable Band-Edge Potentials and High Photocatalytic Hydrogen-Evolution Activity†
Corresponding Author
Prof. Dr. Kazuhiko Maeda
Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550 (Japan)
Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550 (Japan)Search for more papers by this authorDr. Miharu Eguchi
Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571 (Japan)
Precursory Research for Embryonic Science and Technology (Japan), Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 (Japan)
Search for more papers by this authorTakayoshi Oshima
Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550 (Japan)
Search for more papers by this authorCorresponding Author
Prof. Dr. Kazuhiko Maeda
Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550 (Japan)
Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550 (Japan)Search for more papers by this authorDr. Miharu Eguchi
Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571 (Japan)
Precursory Research for Embryonic Science and Technology (Japan), Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 (Japan)
Search for more papers by this authorTakayoshi Oshima
Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550 (Japan)
Search for more papers by this authorWe thank Ryouhei Noma, Prof. Kiyotaka Nakajima, and Prof. Michikazu Hara (Tokyo Institute of Technology) for assistance in Raman measurements. This work was supported by the ENEOS Hydrogen Trust Fund, Grant-in-Aid for Scientific Research on Innovative Areas (Project No. 25107512; AnApple), and the PRESTO/JST program “Chemical Conversion of Light Energy”.
Abstract
Perovskite nanosheets of HCa2−xSrxNb3O10 and HCa2Nb3−yTayO10 with controlled band-edge potentials were prepared. They worked as highly efficient heterogeneous photocatalysts for H2 evolution from a water/methanol mixture under band-gap irradiation. The activity was found to depend on the composition. The highest activity was obtained with HCa2Nb2TaO10 nanosheets, recording an apparent quantum yield of approximately 80 % at 300 nm, which is the highest value for a nanosheet-based photocatalyst reported to date.
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