Selective loading of platinum cocatalyst onto zinc rhodium oxide in a silver-inserted heterojunction overall water-splitting photocatalyst consisting of zinc rhodium oxide and bismuth vanadium oxide

• IRIE Hiroshi

  Clean Energy Research Center, University of Yamanashi Special Educational Program for Green Energy Conversion Science and Technology, Integrated Graduate School of Medicine, Engineering, and Agricultural Sciences, University of Yamanashi

• YODA Masaomi

  Special Educational Program for Green Energy Conversion Science and Technology, Integrated Graduate School of Medicine, Engineering, and Agricultural Sciences, University of Yamanashi

• TAKASHIMA Toshihiro

  Clean Energy Research Center, University of Yamanashi Special Educational Program for Green Energy Conversion Science and Technology, Integrated Graduate School of Medicine, Engineering, and Agricultural Sciences, University of Yamanashi

• OSAKI Junya

  Special Educational Program for Green Energy Conversion Science and Technology, Integrated Graduate School of Medicine, Engineering, and Agricultural Sciences, University of Yamanashi

抄録

Platinum (Pt) was selectively photodeposited onto zinc rhodium oxide (ZnRh₂O₄) to serve as a hydrogen (H₂)-evolution photocatalyst in a silver (Ag)-inserted ZnRh₂O₄ and bismuth vanadium oxide (Bi₄V₂O₁₁) solid-state photocatalyst (ZnRh₂O₄/Ag/Bi₄V₂O₁₁). The amount of deposited Pt was controlled by the photodeposition time to generate Pt-loaded ZnRh₂O₄/Ag/Bi₄V₂O₁₁ (Pt/ZnRh₂O₄/Ag/Bi₄V₂O₁₁) containing up to 0.17 wt % of Pt cocatalyst. The prepared Pt/ZnRh₂O₄/Ag/Bi₄V₂O₁₁ photocatalysts were able to catalyze the overall pure-water splitting reaction under irradiation with red light at a wavelength of 700 nm and enhanced the stoichiometric evolution of H₂ and O₂ from water at Pt amounts exceeding 0.12 wt % of Pt. The apparent quantum efficiency of the water-splitting reaction was highest at 0.17 wt % of Pt. In addition to the loading amount of Pt, the loading of Pt as Pt⁰ (metallic Pt) is crucial for enhancing the water-splitting activity of Pt/ZnRh₂O₄/Ag/Bi₄V₂O₁₁.

収録刊行物

• Journal of the Ceramic Society of Japan

  Journal of the Ceramic Society of Japan 129 (7), 453-457, 2021-07-01

  公益社団法人 日本セラミックス協会

キーワード

• Overall pure water-splitting
• Platinum
• Cocatalyst
• Two-step photoexcitation

詳細情報

• CRID: 1390570022235943680
• NII論文ID: 130008060697
• DOI: 10.2109/jcersj2.20227
• ISSN: 13486535
• ISSN: 18820743
• Web Site: https://www.jstage.jst.go.jp/article/jcersj2/129/7/129_20227/_pdf
• 本文言語コード: en
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