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Issue 8, 2012
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Segregation at a small scale: synthesis of core–shell bimetallic RuPtnanoparticles, characterization and solid state NMR studies

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Abstract

Core–shell small RuPt nanoparticles stabilized by a polymer (polyvinylpyrrolidone, PVP) have been prepared by co-decomposition of [Ru(COD)(COT)] [(1,5-cyclooctadiene)(1,3,5-cyclooctatriene)ruthenium] and [Pt(CH3)2(COD)] [dimethyl(1,5-cyclooctadiene)platinum(II)] organometallic complexes at room temperature. The control of the metal segregation is made possible by the difference in the decomposition temperature of the metal precursors, giving rise to a heterogeneous nucleation process. The structural composition of these nanoparticles has been determined by a combination of techniques (TEM, HREM, WAXS, EXAFS, STEM-HAADF, IR, NMR). In particular, after adsorption of 13CO as a probe molecule, solid-state NMR investigation provided useful information on the chemical segregation in these nanoparticles.

Graphical abstract: Segregation at a small scale: synthesis of core–shell bimetallic RuPt nanoparticles, characterization and solid state NMR studies

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Article information


Submitted
23 Sep 2011
Accepted
09 Dec 2011
First published
11 Jan 2012

J. Mater. Chem., 2012,22, 3578-3584
Article type
Paper

Segregation at a small scale: synthesis of core–shell bimetallic RuPt nanoparticles, characterization and solid state NMR studies

P. Lara, M. Casanove, P. Lecante, P. Fazzini, K. Philippot and B. Chaudret, J. Mater. Chem., 2012, 22, 3578
DOI: 10.1039/C2JM14757B

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