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Location and Dynamics of CO Co-ordination on Ru Nanoparticles: A Solid State NMR Study

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Abstract

The coordination of CO at the surface of very small ruthenium nanoparticles has been investigated by IR and solid state NMR spectroscopies. Two sets of ruthenium nanoparticles stabilized either by a polymer (polyvinylpyrrolidone; PVP) or a ligand (bisdiphenylphosphinobutane; dppb) have been studied in order to evidence any influence of the stabilizer on the location and dynamics of CO molecules at the particles surface. It was found that CO groups are mobile on the surface of the nanoparticles even in the solid state and that bulky ancillary ligands such as dppb may slow down the fluxionality of CO and prevent exchange at certain positions.

Graphical Abstract

Solid state NMR studies evidence the location and mobility of CO adsorbed at the surface of nanoparticles of ruthenium stabilized by PVP whereas nanoparticles of same size but stabilized by a diphosphine ligand do not show such a mobility.

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Acknowledgments

The authors are grateful to Y. Coppel and S. Maynadié-Parres for gas phase and MAS NMR analyses. The authors thank CNRS and l’Agence Nationale de la Recherche for funding (ANR-08-BLAN0010-03 SIDERUS project). F. N.V. is grateful to the Ministerio de Ciencia e Innovación from Spanish government for a postdoctoral fellowship (QMC2008-0614).

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Authors and Affiliations

  1. LCC (Laboratoire de Chimie de Coordination), CNRS, 205 Route de Narbonne, 31077, Toulouse, France

    Fernando Novio, Karine Philippot & Bruno Chaudret

  2. Université de Toulouse, UPS, INPT, LCC, 31077, Toulouse, France

    Fernando Novio, Karine Philippot & Bruno Chaudret

Authors
  1. Fernando Novio
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  2. Karine Philippot
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  3. Bruno Chaudret
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Correspondence to Bruno Chaudret.

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Novio, F., Philippot, K. & Chaudret, B. Location and Dynamics of CO Co-ordination on Ru Nanoparticles: A Solid State NMR Study. Catal Lett 140, 1–7 (2010). https://doi.org/10.1007/s10562-010-0428-7

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  • DOI: https://doi.org/10.1007/s10562-010-0428-7

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