Atomic-scale assembly of a heterogeneous catalytic site

Patrick Han, Stephanus Axnanda, Igor Lyubinetsky, D. Wayne Goodman

    Research output: Contribution to journalArticlepeer-review

    74 Citations (Scopus)

    Abstract

    The distance between surface Pd atoms has been shown to control the catalytic formation of vinyl acetate from ethylene and acetic acid by AuPd catalysts. Here, we use the bulk alloy's thermodynamic properties, as well as the surface lattice spacing of a AuPd(100) alloy single-crystal model catalyst to control and optimize the concentration of the active site (Pd atom pairs at a specific Pd-Pd distance with Au nearest-neighbors). Scanning tunneling microscopy reveals that sample annealing has a direct effect on the surface Pd arrangements: short-range order preferentially forms Pd pairs located in the c(2 x 2) sites, which are known to be optimal for vinyl acetate synthesis. This effect could be harnessed for future industrial catalyst design.

    Original languageEnglish
    Pages (from-to)14355-14361
    Number of pages7
    JournalJournal of the American Chemical Society
    Volume129
    Issue number46
    DOIs
    Publication statusPublished - 2007 Nov 21

    ASJC Scopus subject areas

    • Catalysis
    • Chemistry(all)
    • Biochemistry
    • Colloid and Surface Chemistry

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