Effect of shell thickness of Pd core-porous SiO2 shell catalysts on direct synthesis of H2O2 from H2 and O2

Myung gi Seo, Ho Joong Kim, Sang Soo Han, Kwan Young Lee

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)

    Abstract

    In our previous study, we applied Pd@SiO2 core-shell catalysts to hydrogen peroxide synthesis and obtained a higher yield of hydrogen peroxide than that obtained with the use of general supported-catalysts (Pd/SiO2). As an extension of the previous study on Pd@SiO2 catalysts, the effects of the core-shell thickness on the hydrogen peroxide synthesis reaction were examined in this study. A shell below a certain thickness in the core-shell structure of the Pd nanocatalyst results in a decrease in the catalytic activity. Overall, a volcano curve is observed for the hydrogen peroxide production rate as a function of the shell thickness. Through N2-adsorption and desorption, TEM, CO-chemisorption, and XRD analyses, we identify the causes for the improved direct hydrogen peroxide synthesis yields and later optimize the shell thickness for the efficient utilization of Pd.

    Original languageEnglish
    Pages (from-to)238-243
    Number of pages6
    JournalJournal of Molecular Catalysis A: Chemical
    Volume426
    DOIs
    Publication statusPublished - 2017 Jan 1

    Bibliographical note

    Funding Information:
    This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) ( NRF-2016M3D1A1021143 ). This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MSIP) (2016, University-Institute cooperation program).

    Publisher Copyright:
    © 2016 Elsevier B.V.

    Keywords

    • Core–shell structured catalyst
    • Direct hydrogen peroxide synthesis
    • Palladium catalyst
    • Palladium nanoparticle

    ASJC Scopus subject areas

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

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