Reduction behaviors and catalytic properties for methanol steam reforming of Cu-based spinel compounds CuX2O4 (X=Fe, Mn, Al, La)

Yung Han Huang, Sea Fue Wang, Ampo Sai, Satoshi Kameoka

    研究成果: Article査読

    46 被引用数 (Scopus)

    抄録

    In this study, various Cu-based spinel compounds, i.e., CuFe 2O4, CuMn2O4, CuAl2O 4 and CuLa2O4, were fabricated by a solid-state reaction method. Reduction behaviors and morphological changes of these materials have been characterized by H2 temperature-programmed reduction (H2-TPR), X-ray diffraction (XRD), Scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Moreover, the catalytic properties for steam reforming of methanol (SRM) of these Cu-based spinel compounds were investigated. H2-TPR results indicated that the reducibility of Cu-based spinel compounds was strongly dependent on the B-site component while the CuFe2O4 catalyst revealed the lowest reduction temperature (190 C), followed respectively by CuAl2O 4 (267 C), CuMn2O4 (270 C), and CuLa 2O4 (326 C). The reduced CuAl2O4 catalyst demonstrated the best performance in terms of catalytic activity. Based on the SEM and XRD results, pulverization of the CuAl2O4 particles due to gas evolution and a high concentration of nanosized Cu particles (≈50.9 nm) precipitated on the surfaces of the Al2O 3 support were observed after reduction at 360 C in H2. The BET surface area of the CuAl2O4 catalyst escalated from 5.5 to 13.2 m2/g. Reduction of Cu-based spinel ferrites appear to be a potential synthesis route for preparing a catalyst with high catalytic activity and thermal stability. The catalytic performance of these copper-oxide composites was superior to those of conventional copper catalysts.

    本文言語English
    ページ(範囲)4541-4551
    ページ数11
    ジャーナルCeramics International
    40
    3
    DOI
    出版ステータスPublished - 2014 4 1

    ASJC Scopus subject areas

    • セラミックおよび複合材料
    • プロセス化学およびプロセス工学
    • 電子材料、光学材料、および磁性材料
    • 表面、皮膜および薄膜
    • 材料化学

    フィンガープリント

    「Reduction behaviors and catalytic properties for methanol steam reforming of Cu-based spinel compounds CuX<sub>2</sub>O<sub>4</sub> (X=Fe, Mn, Al, La)」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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