Tailoring porous structure, reducibility and Mn4+ fraction of ε-MnO2 microcubes for the complete oxidation of toluene

Minh Tuan Nguyen Dinh, Chinh Chien Nguyen, Tan Linh Truong Vu, Van Thinh Ho, Quang Duc Truong

    研究成果: Article査読

    15 被引用数 (Scopus)

    抄録

    3D architectures porous epsilon-type manganese dioxide (ε-MnO2) microcubes (PEMD) are successfully prepared by a glucose-urea-assisted hydrothermal synthesis of MnCO3-carbon composites followed by annealing. It turns out that urea essentially assists in building the cubic shape while glucose plays a crucial role to form carbon inside the microcrystals, which are latterly removed by annealing to generate the porous structure. As a result, ε-MnO2 materials possessing extraordinary features including the high porosity, reducibility, lattice oxygen reactivity and Mn4+ fraction, are feasible tailored. These unique properties, all together, significantly improve the catalytic performances of complete oxidation of toluene. Thus, it is found that the optimal catalyst (manganese-glucose-urea ratio of 6-2-6) synthesized at 180 °C exhibits an excellent activity for the complete oxidation of toluene (T90 = 243 °C, lower 10 °C than that of pristine ε-MnO2) and stability up to 10 h.

    本文言語English
    論文番号117473
    ジャーナルApplied Catalysis A: General
    595
    DOI
    出版ステータスPublished - 2020 4 5

    ASJC Scopus subject areas

    • 触媒
    • プロセス化学およびプロセス工学

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