✦ LIBER ✦

Preparation and characterization of polymer-protected PtCo bimetallic colloids and their catalytic properties in the selective hydrogenation of cinnamaldehyde

✍ Scribed by Weiyong Yu; Yuan Wang; Hanfan Liu; Wen Zheng

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 906 KB
Volume: 112
Category: Article
ISSN: 1381-1169
DOI: 10.1016/1381-1169(96)00223-3

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✦ Synopsis

Polymer-protected

Pt/Co bimetallic colloids with Pt/Co molar ratios of 3: 1 and 1: 1 have been prepared by the polyol process and characterized by TEM and XRD. Over the above Pt/Co bimetallic colloid catalyst (Pt/Co = 3: 11, cinnamaldehyde can be selectively hydrogenated to cinnamyl alcohol with 99.8% selectivity at 96.2% conversion. The activity and selectivity can be affected by H,O and NaOH added to the reaction system; the former leads to a highly polar solution and the latter retards the olefinic hydrogenation. The Pt/Co bimetallic colloid is stable enough to withstand the hydrogenation reaction at 333 K and 4.0 MPa.

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