Oxidative decomposition of methanol on subnanometer palladium clusters: The effect of catalyst size and support composition

Sungsik Lee, Byeongdu Lee, Faisal Mehmood, Sönke Seifert, Joseph A. Libera, Jeffrey W. Elam, Jeffrey Greeley, Peter Zapol, Larry A. Curtiss, Michael J. Pellin, Peter C. Stair, Randall E. Winans, Stefan Vajda

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Abstract

Size and support effects in the oxidative decomposition of methanol on amorphous alumina supported subnanometer palladium clusters were studied under realistic reaction conditions of pressure and temperature. The smaller Pd 8-12 clusters were found to promote the decomposition channel to CO and hydrogen, however with mediocre activity due to poisoning. The larger Pd15-18 clusters preferentially produce dimethyl ether and formaldehyde, without signs of posioning. A thin titania overcoat applied on the Pd15-18 improves the sintering-resistance of the catalyst. Accompanying density functional calculations confirm the posioning of small Pd clusters by CO.

Original languageEnglish
Pages (from-to)10342-10348
Number of pages7
JournalJournal of Physical Chemistry C
Volume114
Issue number23
DOIs
Publication statusPublished - Jun 17 2010

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Lee, S., Lee, B., Mehmood, F., Seifert, S., Libera, J. A., Elam, J. W., Greeley, J., Zapol, P., Curtiss, L. A., Pellin, M. J., Stair, P. C., Winans, R. E., & Vajda, S. (2010). Oxidative decomposition of methanol on subnanometer palladium clusters: The effect of catalyst size and support composition. Journal of Physical Chemistry C, 114(23), 10342-10348. https://doi.org/10.1021/jp912220w