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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/5457

Title: Visible lightinduced hydrogen production from glycerol aqueous solution on hybrid Pt–CdS–TiO2 photocatalysts
Other Titles: Journal of Photochemistry and Photobiology A: Chemistry
Authors: Melo, Marcos de Oliveira
Silva, Luciana Almeida
Keywords: Visible light;Glycerol;Hydrogen;Photoinduced reforming;Photocatalysis
Issue Date: 2011
Abstract: Binary (Pt/hexCdS) and ternary (Pt/CdS/TiO2 and Pt/TiO2/hexCdS) hybrid photocatalysts were evaluated in photoinduced reforming of glycerol under visible light irradiation ( > 418 nm). The resulting hybrid materials are photocatalytically efficient with respect to hydrogen gas production. The relative order of reactivity for the synthesized hybrid catalysts was found to be: Pt/hexCdS > Pt/CdS/TiO2 > Pt/TiO2/hexCdS. The systems with CdS/aqueous solution interfacial contact showed higher activity, suggesting that the hydrogen production mechanism can be strongly influenced by hydrolytic surface reactions on CdS. The potential gradient created at the CdS/TiO2 or TiO2/hexCdS interface may also play an important role in the photoelectrochemical mechanism. Therefore, carbonyl compounds such as acrolein and propanone, identified in the liquid phase after 7 h of irradiation, lead us to propose the first steps of a photoelectrochemical mechanism in the photoinduced reforming of glycerol.
Description: texto completo: acesso restrito. p.36– 41.
URI: http://www.repositorio.ufba.br/ri/handle/ri/5457
ISSN: 1010-6030
Appears in Collections:Artigos Publicados em Periódicos (Quimica)

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