Solar water splitting over Rh0.5Cr1.5O3-loaded AgTaO3 of a valence-band-controlled metal oxide photocatalyst

Kenta Watanabe; Akihide Iwase; Akihiko Kudo

doi:10.1039/c9sc05909a

Solar water splitting over Rh_0.5Cr_1.5O₃-loaded AgTaO₃ of a valence-band-controlled metal oxide photocatalyst

Kenta Watanabe, Akihide Iwase, Akihiko Kudo

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

Improvement of water splitting performance of AgTaO₃ (BG 3.4 eV) of a valence-band-controlled photocatalyst was examined. Survey of cocatalysts revealed that a Rh_0.5Cr_1.5O₃ cocatalyst was much more effective than Cr₂O₃, RuO₂, NiO and Pt for water splitting into H₂ and O₂ in a stoichiometric amount. The optimum loading amount of the Rh_0.5Cr_1.5O₃ cocatalyst was 0.2 wt%. The apparent quantum yield (AQY) at 340 nm of the optimized Rh_0.5Cr_1.5O₃(0.2 wt%)/AgTaO₃ photocatalyst reached to about 40%. Rh_0.5Cr_1.5O₃(0.2 wt%)/AgTaO₃ gave a solar to hydrogen conversion efficiency (STH) of 0.13% for photocatalytic water splitting under simulated sunlight irradiation. Bubbles of gasses evolved by the solar water splitting were visually observed under atmospheric pressure at room temperature.

Original language	English
Pages (from-to)	2330-2334
Number of pages	5
Journal	Chemical Science
Volume	11
Issue number	9
DOIs	https://doi.org/10.1039/c9sc05909a
Publication status	Published - 7 Mar 2020

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@article{96c95cee8ae441859bc1933e44c23922,

title = "Solar water splitting over Rh0.5Cr1.5O3-loaded AgTaO3 of a valence-band-controlled metal oxide photocatalyst",

abstract = "Improvement of water splitting performance of AgTaO3 (BG 3.4 eV) of a valence-band-controlled photocatalyst was examined. Survey of cocatalysts revealed that a Rh0.5Cr1.5O3 cocatalyst was much more effective than Cr2O3, RuO2, NiO and Pt for water splitting into H2 and O2 in a stoichiometric amount. The optimum loading amount of the Rh0.5Cr1.5O3 cocatalyst was 0.2 wt%. The apparent quantum yield (AQY) at 340 nm of the optimized Rh0.5Cr1.5O3(0.2 wt%)/AgTaO3 photocatalyst reached to about 40%. Rh0.5Cr1.5O3(0.2 wt%)/AgTaO3 gave a solar to hydrogen conversion efficiency (STH) of 0.13% for photocatalytic water splitting under simulated sunlight irradiation. Bubbles of gasses evolved by the solar water splitting were visually observed under atmospheric pressure at room temperature.",

author = "Kenta Watanabe and Akihide Iwase and Akihiko Kudo",

note = "Funding Information: This work was supported by JSPS KAKENHI Grant Numbers 17H06433 in Scientic Research on Innovative Areas “Innovations for Light-Energy Conversion (I4LEC)” and 17H0127. The authors gratefully thank Dr T. Ichihashi for assistance with TEM measurements. Publisher Copyright: {\textcopyright} 2020 The Royal Society of Chemistry.",

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doi = "10.1039/c9sc05909a",

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T1 - Solar water splitting over Rh0.5Cr1.5O3-loaded AgTaO3 of a valence-band-controlled metal oxide photocatalyst

AU - Watanabe, Kenta

AU - Iwase, Akihide

AU - Kudo, Akihiko

N1 - Funding Information: This work was supported by JSPS KAKENHI Grant Numbers 17H06433 in Scientic Research on Innovative Areas “Innovations for Light-Energy Conversion (I4LEC)” and 17H0127. The authors gratefully thank Dr T. Ichihashi for assistance with TEM measurements. Publisher Copyright: © 2020 The Royal Society of Chemistry.

PY - 2020/3/7

Y1 - 2020/3/7

N2 - Improvement of water splitting performance of AgTaO3 (BG 3.4 eV) of a valence-band-controlled photocatalyst was examined. Survey of cocatalysts revealed that a Rh0.5Cr1.5O3 cocatalyst was much more effective than Cr2O3, RuO2, NiO and Pt for water splitting into H2 and O2 in a stoichiometric amount. The optimum loading amount of the Rh0.5Cr1.5O3 cocatalyst was 0.2 wt%. The apparent quantum yield (AQY) at 340 nm of the optimized Rh0.5Cr1.5O3(0.2 wt%)/AgTaO3 photocatalyst reached to about 40%. Rh0.5Cr1.5O3(0.2 wt%)/AgTaO3 gave a solar to hydrogen conversion efficiency (STH) of 0.13% for photocatalytic water splitting under simulated sunlight irradiation. Bubbles of gasses evolved by the solar water splitting were visually observed under atmospheric pressure at room temperature.

AB - Improvement of water splitting performance of AgTaO3 (BG 3.4 eV) of a valence-band-controlled photocatalyst was examined. Survey of cocatalysts revealed that a Rh0.5Cr1.5O3 cocatalyst was much more effective than Cr2O3, RuO2, NiO and Pt for water splitting into H2 and O2 in a stoichiometric amount. The optimum loading amount of the Rh0.5Cr1.5O3 cocatalyst was 0.2 wt%. The apparent quantum yield (AQY) at 340 nm of the optimized Rh0.5Cr1.5O3(0.2 wt%)/AgTaO3 photocatalyst reached to about 40%. Rh0.5Cr1.5O3(0.2 wt%)/AgTaO3 gave a solar to hydrogen conversion efficiency (STH) of 0.13% for photocatalytic water splitting under simulated sunlight irradiation. Bubbles of gasses evolved by the solar water splitting were visually observed under atmospheric pressure at room temperature.

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DO - 10.1039/c9sc05909a

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JO - Chemical Science

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Solar water splitting over Rh_0.5Cr_1.5O₃-loaded AgTaO₃ of a valence-band-controlled metal oxide photocatalyst

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