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Issue 1, 2014
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Probing the surface of platinum nanoparticles with 13CO by solid-state NMR and IR spectroscopies

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Abstract

The synthesis and full characterization of platinum nanoparticles (Pt NPs) prepared by decomposition of the Pt(dba)2 complex in the presence of CO and H2 and stabilized either sterically by a polymer, polyvinylpyrrolidone or chemically by a ligand, diphenylphosphinobutane, are reported. In these studies, 13CO was used as a probe molecule to investigate the surface of the particles, using IR and solid-state NMR spectroscopies with magic angle spinning (MAS-NMR). Three nanosystems with different sizes are described: Pt/PVP/13CO (monomodal: 1.2 nm), Pt/dppb/13CO (bimodal: 1.2 nm and 2.0 nm) and Pt/dppb/H2 (monomodal: 2.0 nm) NPs. Spectroscopic data suggest a modification of the electronic state of the nanoparticles between 1.2 nm and 2.0 nm which can be related to the presence of Knight shift.

Graphical abstract: Probing the surface of platinum nanoparticles with 13CO by solid-state NMR and IR spectroscopies

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Publication details

The article was received on 30 Jul 2013, accepted on 02 Oct 2013 and first published on 10 Oct 2013


Article type: Paper
DOI: 10.1039/C3NR03948J
Citation: Nanoscale, 2014,6, 539-546
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    Probing the surface of platinum nanoparticles with 13CO by solid-state NMR and IR spectroscopies

    S. Kinayyigit, P. Lara, P. Lecante, K. Philippot and B. Chaudret, Nanoscale, 2014, 6, 539
    DOI: 10.1039/C3NR03948J

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