Synergistic effect of Pt or Pd and perovskite oxide for water gas shift reaction

Yasushi Sekine, Haruka Takamatsu, Sho Aramaki, Kazuki Ichishima, Mitsuko Takada, Masahiko Matsukata, Eiichi Kikuchi

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    23 Citations (Scopus)

    Abstract

    The water gas shift (WGS) reaction over Pt and Pd catalysts supported on various perovskite oxides has been investigated at 573 K without catalyst pretreatment. The Pt and Pd catalysts on LaCoO3 support showed high catalytic activity. Interaction between Pt or Pd and the support is considered to promote the WGS reaction: Pt/LaCoO3 had high initial activity but deactivated immediately; Pd/LaCoO3 was less active than Pt/LaCoO3, but had superior stability. Catalysts were characterized using XRD, STEM, XPS, and H2-temperature programmed reduction (TPR). Results of this study showed that reduction of the support decreased the CO conversion on Pt/LaCoO3. On the other hand, Pd/LaCoO3 showed stable activity for the WGS reaction. Therefore, Pd was added to Pt/LaCoO3 for stabilizing the catalyst activity, and 0.5 wt.% Pd/1 wt.% Pt/LaCoO3 catalyst showed higher activity and stability.

    Original languageEnglish
    Pages (from-to)214-222
    Number of pages9
    JournalApplied Catalysis A: General
    Volume352
    Issue number1-2
    DOIs
    Publication statusPublished - 2009 Jan 15

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    Keywords

    • Lattice oxygen
    • Pd catalyst
    • Perovskite oxide
    • Pt catalyst
    • Synergistic effect
    • Water gas shift

    ASJC Scopus subject areas

    • Catalysis
    • Process Chemistry and Technology

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