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

    Research output: Contribution to journalArticle

    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

    Fingerprint

    Water gas shift
    Perovskite
    Oxides
    Catalysts
    Catalyst supports
    Catalyst activity
    Carbon Monoxide
    X ray photoelectron spectroscopy
    perovskite
    Temperature

    Keywords

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

    ASJC Scopus subject areas

    • Catalysis
    • Process Chemistry and Technology

    Cite this

    Synergistic effect of Pt or Pd and perovskite oxide for water gas shift reaction. / Sekine, Yasushi; Takamatsu, Haruka; Aramaki, Sho; Ichishima, Kazuki; Takada, Mitsuko; Matsukata, Masahiko; Kikuchi, Eiichi.

    In: Applied Catalysis A: General, Vol. 352, No. 1-2, 15.01.2009, p. 214-222.

    Research output: Contribution to journalArticle

    Sekine, Yasushi ; Takamatsu, Haruka ; Aramaki, Sho ; Ichishima, Kazuki ; Takada, Mitsuko ; Matsukata, Masahiko ; Kikuchi, Eiichi. / Synergistic effect of Pt or Pd and perovskite oxide for water gas shift reaction. In: Applied Catalysis A: General. 2009 ; Vol. 352, No. 1-2. pp. 214-222.
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    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.",
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    AU - Sekine, Yasushi

    AU - Takamatsu, Haruka

    AU - Aramaki, Sho

    AU - Ichishima, Kazuki

    AU - Takada, Mitsuko

    AU - Matsukata, Masahiko

    AU - Kikuchi, Eiichi

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    N2 - 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.

    AB - 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.

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    KW - Pt catalyst

    KW - Synergistic effect

    KW - Water gas shift

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