Synthesis and characterization of Mn3O4 and Mn2O3 nanocrystals on SBA-15: Novel combustion catalysts at low reaction temperatures

Yi Fan Han*, Fengxi Chen, Zi Yi Zhong, Kanaparthi Ramesh, Effendi Widjaja, Lu Wei Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

A simple method established in the present study has proven to be effective on the synthesis of Mn3O4 and Mn2O3 nanocrystals by using mesoporous silicas (SBA-15) as nanoreactor. These catalysts were characterized by XRD, TEM, N2-physisorption and laser Raman spectroscopic techniques. The structures obtained by thermolysis of Mn(II and III) acetylacetonates on SBA-15 were confirmed by XRD and Raman analysis. TEM characterization in combination with N2 physisorption studies reveal that nanoparticles partially occupying the pores of SBA-15. The nanocrystals of Mn3O4 and Mn2O3 on SBA-15 exhibited tremendous catalytic activities during the steady-state CO oxidation at low reaction temperatures (below 523 K). The catalytic activity of these catalysts was found to be higher compared with traditional MnOx impregnated on SBA-15 catalysts. For the sake of comparison, the commercial Mn2O3 and Mn3O4 were also tested for the CO oxidation.

Original languageEnglish
Pages (from-to)739-744
Number of pages6
JournalCatalysis Communications
Volume7
Issue number10
DOIs
StatePublished - Oct 2006
Externally publishedYes

Keywords

  • CO oxidation and TEM
  • MnO
  • MnO
  • Nanocrystalline manganese oxides
  • SBA-15

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