Shape-dependent catalytic activity of palladium nanoparticles for the direct synthesis of hydrogen peroxide from hydrogen and oxygen

Seongmin Kim, Dae Won Lee, Kwan Young Lee

    Research output: Contribution to journalArticlepeer-review

    63 Citations (Scopus)

    Abstract

    In this study, single-crystal Pd nanocubes and nanooctahedrons were prepared by the colloidal method and their catalytic activities were compared in direct hydrogen peroxide synthesis. Using sodium tetrachloropalladate (II) as the Pd precursor, l-ascorbic acid (or formaldehyde) as the reducing agent, potassium bromide as the capping agent, and polyvinylpyrrolidone as the stabilizer, Pd nanocubes were obtained in a uniform size (9 nm). Pd octahedrons (23 nm in edge length) were synthesized via seed-mediated growth of the Pd nanocube, where the morphology of the cube was altered to that of a cuboctahedron, truncated octahedron, and octahedron, in series. The cubes and octahedrons were enclosed by {1 0 0} and {1 1 1} facets, respectively. In activity tests, the Pd octahedron presented higher hydrogen peroxide selectivity and productivity than the Pd cube. It is therefore suggested that the Pd {1 1 1} facet is more active than the Pd {1 0 0} facet in direct hydrogen peroxide synthesis.

    Original languageEnglish
    Pages (from-to)48-54
    Number of pages7
    JournalJournal of Molecular Catalysis A: Chemical
    Volume391
    Issue number1
    DOIs
    Publication statusPublished - 2014 Sept

    Bibliographical note

    Funding Information:
    This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (Ministry of Science, ICT & Future Planning)” (2013, University-Institute Cooperation Program)

    Funding Information:
    This work was supported by the Human Resources Development program (No. 20114010203050) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry and Energy

    Funding Information:
    Dr. Dae-Won Lee was supported by Korea University Grant.

    Keywords

    • Direct synthesis of hydrogen peroxide
    • Nanocatalyst
    • Nanocube
    • Nanooctahedron
    • Palladium

    ASJC Scopus subject areas

    • Catalysis
    • Process Chemistry and Technology
    • Physical and Theoretical Chemistry

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