Mesoporous assembly of 2D manganate nanosheets intercalated with cobalt ions

Tae Woo Kim, Tae Sung Jung, Sang Hoon Hyun, Seong Ju Hwang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Mesoporous compound of cobalt-layered manganese oxide was synthesized by self-assembly reaction between 2D manganate nanosheets and cobalt ions. It was found that 2D manganate nanosheets are interstratified with cobalt ions, leading to the formation of porous intercalation heterostructure with expanded surface area of ∼ 44-100 m2/g. The mesopores with the average diameters of ∼ 11-17 nm originate from the house-of-cards type stacking of the layered manganate crystallites. Co K- and Mn K-edge X-ray absorption spectroscopy revealed that both the cobalt and manganese ions are stabilized in octahedral symmetry with the mixed oxidation states of Mn3+/Mn4+ and Co2+/Co3+. Considering high oxidation states of component metal ions, this porous material is expected to be very useful as redox catalysts and/or lithium intercalation electrodes.

Original languageEnglish
Pages (from-to)565-568
Number of pages4
JournalMaterials Letters
Volume64
Issue number5
DOIs
Publication statusPublished - 2010 Mar 15

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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