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Issue 25, 2011
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Solid-solid conversion of ordered crystalline mesoporous metal oxides under reducing atmosphere

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Abstract

The reduction of a series of crystalline mesoporous metal oxides, CeO2, Co3O4, Cr2O3, CuO, β-MnO2, Mn3O4, and NiO, was investigated using hydrogen temperature-programmed reduction (H2-TPR). CeO2 and Cr2O3 could not be reduced. Mesoporous Mn3O4 and NiO are reduced at almost the same temperature as their bulk counterparts, and mesoporous Co3O4, CuO, and β-MnO2 are reduced at lower temperatures than the corresponding bulk materials. In particular, mesoporous Co3O4 and β-MnO2 undergo reduction to CoO and Mn3O4 while preserving the mesostructure. Further reduction of CoO and Mn3O4, NiO, and CuO does not form mesoporous metal: in the case of CuO, a mesoporous intergrowth of Cu/Cu2O is obtained, and for the rest metal oxides, particles are formed.

Graphical abstract: Solid-solid conversion of ordered crystalline mesoporous metal oxides under reducing atmosphere

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Publication details

The article was received on 21 Jan 2011, accepted on 17 Mar 2011 and first published on 18 May 2011


Article type: Paper
DOI: 10.1039/C1JM10336A
Citation: J. Mater. Chem., 2011,21, 9312-9318
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    Solid-solid conversion of ordered crystalline mesoporous metal oxides under reducing atmosphere

    Y. Ren, P. G. Bruce and Z. Ma, J. Mater. Chem., 2011, 21, 9312
    DOI: 10.1039/C1JM10336A

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