1. Seed-mediated synthesis of bimetallic ruthenium-platinum nanoparticles efficient in cinnamaldehyde selective hydrogenation.
- Author
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Xueqiang Qi, Axet, M. Rosa, Philippot, Karine, Lecante, Pierre, and Serp, Philippe
- Subjects
RUTHENIUM compound synthesis ,METAL nanoparticles ,ALDEHYDES ,HYDROGENATION ,CRYSTAL structure ,BIMETALLIC catalysts - Abstract
Core-shell RuPt (Ru core-Pt shell) and PtRu (Pt core-Ru shell) nanoparticles were prepared by decomposing in a two-step procedure a ruthenium ([Ru(COD)(COT)] (COD = 1,5-cyclooctadiene, COT = 1,3,5-cyclooctatriene)) and a platinum complex ([Pt
2 (dba)3 ] (dba = dibenzylideneacetone) or [Pt(CH3 )2 (COD)]) in the presence of 4-(3-phenylpropyl)pyridine (PPP) as a stabilizer and using different Ru/Pt ratios. The data obtained from a combination of several analyses (TEM, HRTEM, WAXS and IR) indicate that the soobtained nanoparticles present a core-shell structure. The catalytic performances of these bimetallic nanoparticles for the selective hydrogenation of trans-cinnamaldehyde were investigated, which provided interesting results as well as useful information to elucidate their structure and composition. Indeed, the catalytic results evidence that: (1) the combination of both metals led in some cases to a synergistic effect on the selectivity of the reaction, and (2) the structure and the composition affected the selectivity of the reaction. [ABSTRACT FROM AUTHOR]- Published
- 2014
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