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

Yu Ren, Peter G. Bruce, Zhen Ma

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

The reduction of a series of crystalline mesoporous metal oxides, CeO2, Co3O4, Cr2O3, CuO, beta-MnO2, Mn3O4, and NiO, was investigated using hydrogen temperature-programmed reduction (H-2-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 beta-MnO2 are reduced at lower temperatures than the corresponding bulk materials. In particular, mesoporous Co3O4 and beta-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.

Original languageEnglish
Pages (from-to)9312-9318
Number of pages7
JournalJournal of Materials Chemistry
Volume21
Issue number25
DOIs
Publication statusPublished - 2011

Keywords

  • RECHARGEABLE LITHIUM BATTERIES
  • FACILE SYNTHESIS
  • ELECTROCHEMICAL DEPOSITION
  • CATALYTIC-OXIDATION
  • PORE STRUCTURE
  • ION BATTERIES
  • FILMS
  • SILICA
  • TEMPLATE
  • CO3O4

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