期刊
JOURNAL OF CATALYSIS
卷 300, 期 -, 页码 9-19出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2012.12.007
关键词
TiO2@SBA-15 composites; Pt nanoparticles; Liquid-phase hydrogenation; Benzaldehyde; Unsaturated compounds
资金
- National Natural Science Foundation of China [21273076, 20925310]
- Shanghai Rising-Star Program [08QA1402700]
- State Key Laboratory of Catalysis in DICP, CAS [N-11-05]
- Shanghai Leading Academic Discipline Project [B409]
A series of TiO2@SBA-15 composites with different TiO2 loadings have been synthesized through hydrolysis of tetrabutyl orthotitanate via a facile sol gel method in the presence of SBA-15 mesoporous silica. The TiO2@SBA-15 composites retain the mesostructure of the SBA-15 host, and TiO2 is highly dispersed and uniformly coated. The TiO2@SBA-15 composites serve as remarkable supports for Pt nanoparticles, which can be applied efficiently to the liquid-phase hydrogenation of benzaldehyde, its derivatives, and other unsaturated compounds under mild conditions. Of particular note is that the Pt/TiO2@SBA-15 catalysts can be reused several times without distinct loss in activity or selectivity. The more electron-deficient surface state, together with the structural and physicochemical features of Pt/TiO2@SBA-15 catalysts, would improve the catalytic activity and reusability toward the liquid-phase hydrogenation of unsaturated compounds. (C) 2012 Elsevier Inc. All rights reserved.
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