Confined-interface-directed synthesis of Palladium single-atom catalysts on graphene/amorphous carbon

Jiangbo Xi, Hongyu Sun, Zheye Zhang, Xianming Duan, Junwu Xiao, Fei Xiao, Limin Liu*, Shuai Wang

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review

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    Abstract

    The maximized atomic efficiency of supported catalysts is highly desired in heterogeneous catalysis. Therefore, the design and development of active, stable, and atomic metal-based catalysts remains a formidable challenge. To tackle these problems, it is necessary to investigate the interaction between single atoms and supports. Theoretical calculations indicate that the Pd binding strength is higher on graphene/amorphous carbon (AC) than that on graphene or AC substrate. Based on these predictions, we present a facile confined-interface-directed synthesis route for the preparation of single-atom catalysts (SACs) in which Pd atoms are well-dispersed on the interface of double-shelled hollow carbon nanospheres with reduced graphene oxide (RGO) as the inner shell and AC as the outer shell. Owing to the synergetic effect of the RGO/AC confined interface and the atomically dispersed Pd, the as-made RGO@AC/Pd SAC achieves the maximum atomic efficiency (catalytic activity) of Pd species and exhibits an excellent stability in chemical catalysis. This confined-interface-directed synthesis method provides a novel direction to maximize the atomic efficiency, improve the activity, and enhance the stability of metal-based catalysts.
    Original languageEnglish
    JournalApplied Catalysis B: Environmental
    Volume225
    Pages (from-to)291-297
    ISSN0926-3373
    DOIs
    Publication statusPublished - 2018

    Keywords

    • Single-atom catalyst
    • Graphene
    • Amorphous carbon
    • Confined-interface-directed synthesis
    • Chemical catalysis

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