Catalytic hydrogenation of benzaldehydes over platinum nanoparticles immobilized on magnesium aluminate spinel under mild conditions

被引：19

作者：

Han, Ming ^{[1
]}

Zhang, Hailu ^{[2
]}

Du, Yukou ^{[1
]}

Yang, Ping ^{[1
]}

Deng, Zongwu ^{[2
]}

机构：

[1] Soochow Univ, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Peoples R China

[2] Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, Suzhou 215123, Peoples R China

来源：

REACTION KINETICS MECHANISMS AND CATALYSIS | 2011年 / 102卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Catalytic hydrogenation; Benzaldehydes; Benzyl alcohols; Platinum nanoparticles; Supported Pt/MgAl2O4 catalysts; SELECTIVE HYDROGENATION; METAL CATALYSTS; SUPPORT; SIZE; ALDEHYDES; DEHYDROGENATION; CROTONALDEHYDE; PERFORMANCE; PROPANE; TOLUENE;

D O I：

10.1007/s11144-010-0266-z

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Platinum nanoparticles, synthesized via ethanol reduction of hexachloroplatinic acid in the presence of poly-(N-vinyl-2-pyrrolidone), were anchored on magnesium aluminate spinel using a colloidal deposition method. The samples were characterized using the following methods: transmission electron microscopy, powder X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy. The results revealed that platinum nanoparticles, with an average diameter of 2.8 nm, are homogenously dispersed on the surface of the carrier. Under very mild conditions, supported Pt/MgAl2O4 catalysts demonstrated excellent catalytic activity and high selectivity in the hydrogenation reaction of benzaldehydes to benzyl alcohols. The reaction kinetics for the catalytic hydrogenation of 3-phenoxybenzaldehyde to 3-phenoxybenzyl alcohol on a Pt/MgAl2O4 catalyst can be described by equation r = k x c(1.44) x p(H2), and the apparent activation energy is 35.6 kJ mol(-1)

引用

页码：393 / 404

页数：12

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