Bifunctions of a Cr hydroxide layer for water splitting over a platinized Au/TiO2 plasmonic photocatalyst under visible light irradiation

被引:6
作者
Fudo, Eri [1 ]
Tanaka, Atsuhiro [2 ,3 ]
Kominami, Hiroshi [2 ]
机构
[1] Kindai Univ, Grad Sch Sci & Engn, Dept Mol & Mat Engn, Higashiosaka, Osaka 5778502, Japan
[2] Kindai Univ, Fac Sci & Engn, Dept Appl Chem, Higashiosaka, Osaka 5778502, Japan
[3] Japan Sci & Technol Agcy JST, Precursory Res Embryon Sci & Technol PRESTO, Kawaguchi 3320012, Japan
基金
日本科学技术振兴机构;
关键词
Water splitting; Plasmonic photocatalyst; Hole-transferring cocatalyst; PHOTOINDUCED HYDROGEN FORMATION; GOLD NANOPARTICLES; AQUEOUS SUSPENSION; CERIUM(IV) OXIDE; DECOMPOSITION; COCATALYSTS; EXCITATION; OXIDATION; ALDEHYDES; ALCOHOLS;
D O I
10.1016/j.cattod.2022.05.024
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Plasmonic water splitting (H2O-+ H2 + 1/2O2) over a metal-loaded metal oxide under irradiation of a wide range of visible light is an ideal way for H2 production that does not rely on the use of fossil resources. For larger production of H2, cocatalysts having a small hydrogen overpotential such as platinum (Pt) and Rh nanoparticles (NPs) is indispensable; however, these metals induce the back reaction, resulting in low activity for water splitting. In this study, chromium hydroxide (Cr(OH)3) was introduced to gold-titanium(IV) oxide having Pt NPs plasmonic photocatalysts (Au/TiO2-Pt) and the thus-prepared Cr(OH)3/[Au/TiO2-Pt] and related photocatalyst were characterized by using a transmission electron microscope equipped with an energy dispersive X-ray analyzer. Functions of the Cr(OH)3 layer in Cr(OH)3/[Au/TiO2-Pt] were evaluated through photocatalytic re-actions under various conditions. The reduction sites of Cr(OH)3/[Au/TiO2-Pt] and the reaction mechanism of water splitting are discussed on the basis of experimental results.
引用
收藏
页码:323 / 331
页数:9
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