Effects of Cu oxidation states on the catalysis of NO+CO and N2O+CO reactions

Hirone Iwamoto, Satoshi Kameoka, Ya Xu, Chikashi Nishimura, Ampo Sai

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)

    Abstract

    The relationship between the oxidation state of bulk Cu and catalytic activity during the NO + CO and N2O + CO reactions were investigated, using commercially available Cu, Cu2O and CuO powders. Metallic Cu powder was found to catalyze both reactions in a stable manner without changing its oxidation state. At elevated temperatures, the catalytic activities of the Cu2O and CuO increased with time, in conjunction with reduction by CO to metallic Cu in both cases. The data confirm that metallic Cu exhibits much high activity and stability than either Cu2O or CuO for both the NO + CO and N2O + CO reactions. In addition, Cu2O species (denoted as Cu2O*) formed via oxidation of metallic Cu species obtained by reduction of CuO with CO at low temperature (<300 °C) showed catalytic activity during both reactions as a result of the high surface area and structural disorder of this material.

    Original languageEnglish
    Pages (from-to)64-73
    Number of pages10
    JournalJournal of Physics and Chemistry of Solids
    Volume125
    DOIs
    Publication statusPublished - 2019 Feb

    Keywords

    • Cu
    • CuO
    • CuO
    • NO + CO reaction
    • NO + CO reaction

    ASJC Scopus subject areas

    • Chemistry(all)
    • Materials Science(all)
    • Condensed Matter Physics

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