Preparation and characterization of polymer-stabilized ruthenium-platinum and ruthenium-palladium bimetallic colloids and their catalytic properties for hydrogenation of o-chloronitrobenzene

被引：88

作者：

Liu, MH

Yu, WY

Liu, HF ^{[1
]}

Zheng, JM

机构：

[1] Chinese Acad Sci, Polymer Chem Lab, Beijing 100080, Peoples R China

[2] Chinese Acad Sci, Inst Chem, China Petrochem Corp, Beijing 100080, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1999年 / 214卷 / 02期

基金：

中国国家自然科学基金;

关键词：

ruthenium-containing bimetallic colloids; selective hydrogenation; o-chloronitrobenzene; metal ions;

D O I：

10.1006/jcis.1999.6186

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：

Colloidal dispersions of poly(N-vinyl-2-pyrrolidone) (PVP)-stabilized ruthenium-platinum and ruthenium-palladium bimetallic colloids were prepared by NaBH4 reduction of the corresponding mixed-metal salts at room temperature and characterized by TEM, XPS, and XRD. The resulting bimetallic colloids were used as catalysts for the selective hydrogenation of o-chloronitrobenzene (o-CNB) in methanol at 303 K under 0.1 MPa of hydrogen. It was observed that the catalytic performance of PVP-stabilized ruthenium-platinum colloids (PVP-Ru/Pt) and ruthenium-palladium colloids (PVP-Ru/Pd) was dependent on their compositions and could be remarkably affected by some added metal cations. In the presence of cobalt ion, nearly 100% selectivity to o-chloroaniline (o-CAN) was achieved over PVP-Ru/Pt colloids at 100% conversion of o-CNB, with an activity two orders of magnitude higher than that of monometallic PVP-Ru colloid. (C) 1999 Academic Press.

引用

页码：231 / 237

页数：7

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