Spinel CuFe2O4: A precursor for copper catalyst with high thermal stability and activity

Satoshi Kameoka, Toyokazu Tanabe, An Pang Tsai

    Research output: Contribution to journalArticlepeer-review

    132 Citations (Scopus)

    Abstract

    Spinel CuFe2O4 has been studied as a precursor for copper catalyst. The spinel CuFe2O4 was effectively formed on the SiO2 by calcination in air at 800 °C with the atomic ratio of Fe/Cu = 2. The spinel CuFe2O4 on the SiO 2 was reduced to fine dispersion of Cu and Fe3O 4 particles by the H2 reduction at 240 °C. After H2 reduction at 600 °C, sintering of Cu particles over the CuFe2O4/SiO2 (Fe/Cu = 2) was inhibited significantly, while fatal sintering of Cu particles over the Cu/SiO2 (Fe/Cu = 0) occurred. The CuFe2O4/SiO2 catalyst exhibited much higher activity and thermal stability for steam reforming of methanol (SRM), compared with the Cu/SiO2 catalyst. The spinel CuFe2O4 on the SiO2 can be regenerated after an intentional sintering treatment by calcination in air at 800 °C where the activity is also restored completely. Based on these findings, we propose that spinel CuFe2O4 is an effective precursor for a high performance copper catalyst in which the immiscible interaction between Cu and Fe (or Fe oxide) plays an important role in the stabilization of Cu particles.

    Original languageEnglish
    Pages (from-to)89-93
    Number of pages5
    JournalCatalysis Letters
    Volume100
    Issue number1-2
    DOIs
    Publication statusPublished - 2005 Mar 1

    Keywords

    • CuFeO
    • Immiscible
    • Methanol steam reforming
    • Regeneration
    • Spinel
    • Thermal stability

    ASJC Scopus subject areas

    • Catalysis
    • Chemistry(all)

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