Multitechnique investigation of the physisorption and thermal treatment of mixed-metal clusters on carbon.

Willocq, Christopher;Delcorte, Arnaud;Hermans, Sophie;Bertrand, Patrick;Devillers, Michel
(2005) The Journal of Physical Chemistry Part B: Condensed Matter, Materials, Surfaces, Interfaces & Biophysical — Vol. 109, n° 19, p. 9482-9489 (2005)

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Authors
  • Willocq, ChristopherUCLouvain
    Author
  • Delcorte, ArnaudUCLouvain
    Author
  • Hermans, SophieUCLouvain
    Author
  • Bertrand, PatrickUCLouvain
    Author
  • Devillers, Michelorcid-logoUCLouvain
    Author
Abstract
The three clusters [Ru6PtC(CO)16(COD)] (1), [Ru5PtC(CO)14(COD)] (2) (COD = 1,5-cyclooctadiene), and (NEt4)2[Pd6Ru6(CO)24] (3) were physisorbed onto an active carbon support and used as molecular precursors for supported particles. The samples before and after thermal treatment at 300 degrees C were characterized by a combination of SIMS, XPS, SEM and XRD. It was found that the clusters are molecularly intact, but present in the form of agglomerates on the support at the end of the physisorption step. After thermal treatment, the ligands were lost in all cases, leaving on the surface bimetallic particles containing both starting metals (Ru-Pt in the case of 1 and 2, and Ru-Pd in the case of 3). The presence of the counterion was evidenced for 3, before, but not after, heating. Molecular clusters are thus interesting precursors for the preparation of supported bimetallic phases, and SIMS is the ideal technique to characterize them at each step of their preparation.
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Willocq, C., Delcorte, A., Hermans, S., Bertrand, P., & Devillers, M. (2005). Multitechnique investigation of the physisorption and thermal treatment of mixed-metal clusters on carbon. The Journal of Physical Chemistry Part B: Condensed Matter, Materials, Surfaces, Interfaces & Biophysical, 109(19), 9482-9489. https://doi.org/10.1021/jp050560q (Original work published 2005)