Dependence of photocatalytic activities upon the structures of Au/Pd bimetallic nanoparticles immobilized on TiO2 surface

• Published in: Applied catalysis. B, Environmental Vol. 94; no. 3-4; pp. 248 - 253
• Main Authors: Mizukoshi, Yoshiteru, Sato, Kazuhisa, Konno, Toyohiko J., Masahashi, Naoya
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 10-02-2010; Elsevier
• Subjects: Catalysis; Chemistry; Colloidal state and disperse state; Exact sciences and technology; General and physical chemistry; Nanostructure; Photocatalyst; Photochemistry; Physical and chemical studies. Granulometry. Electrokinetic phenomena; Physical chemistry of induced reactions (with radiations, particles and ultrasonics); Promotional effect; Sonochemistry; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Ultrasonic chemistry; Nanostructure; Promotional effect; Sonochemistry; Photocatalyst; Binary compound; Ethanol; Nanoparticle; Photocatalysis; Alloys; Transition element compounds; Alcohol; Heterogeneous catalysis; Alkanol; Aqueous solution; Titanium oxide; Structure; Environmental protection
• ISSN: 0926-3373; 1873-3883
• DOI: 10.1016/j.apcatb.2009.11.015

Bimetallic nanoparticles with a Au-core/Pd-shell structure were prepared and successfully immobilized on a TiO2 surface using sonochemical method. When immobilizing the core/shell structured bimetallic nanoparticles with a Au/Pd molar ratio of 25/75, TiO2 showed the highest activity for the photochemical H2 evolution from ethanol aqueous solution. The activities of other two types of photocatalysts with the same Au/Pd molar ratio, TiO2 immobilizing the mixture of Au and Pd monometallic nanoparticle, and TiO2 immobilizing Au/Pd random alloy nanoparticles wherein Au and Pd atoms homogeneously located, were also evaluated. The dependence of the photocatalytic activities on the nanostructures of the immobilized bimetals was confirmed.