Lead ruthenate nanocrystals on reduced graphene oxides as an efficient bifunctional catalyst for metal–air batteries

Subin Na, Boeun Lee, Woo Young Yoon, Taeeun Yim, Si Hyoung Oh

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    A composite consisting of lead ruthenate nanocrystals with an expanded pyrochlore structure on reduced graphene oxide nano-sheets, is reported as an efficient bifunctional catalyst for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Comparative studies for ORR show that the composite produces highly positive synergic coupling effects, strengthening a four-electron catalytic route, i.e., more positive onset potential, higher limiting current density, much smaller Tafel slope, and more durable catalytic performance after thousands of voltammetric cycling than pristine material. The composite also functions as an excellent and durable OER catalyst, exceeding the performance of NiCo2O4 and RuO2.

    Original languageEnglish
    Pages (from-to)409-417
    Number of pages9
    JournalJournal of Industrial and Engineering Chemistry
    Volume79
    DOIs
    Publication statusPublished - 2019 Nov 25

    Bibliographical note

    Publisher Copyright:
    © 2019 The Korean Society of Industrial and Engineering Chemistry

    Keywords

    • Bifunctional catalyst
    • Composite
    • Expanded pyrochlore
    • Rechargeable metal–air batteries
    • Reduced graphene oxide

    ASJC Scopus subject areas

    • General Chemical Engineering

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