Synthesis, characterization and photocatalytic reactivities of Mo-MCM-41 mesoporous molecular sieves: Effect of the Mo content on the local structures of Mo-oxides

Shinya Higashimoto, Yun Hu, Rie Tsumura, Kiyoshi Iino, Masaya Matsuoka, Hiromi Yamashita, Yong Gun Shul, Michel Che, Masakazu Anpo

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Abstract

A series of Mo-MCM-41 mesoporous molecular sieves of varying Mo content were synthesized and the local structures of their active sites characterized by means of XRD, UV-vis, photoluminescence, and XAFS measurements. Mo-MCM-41 was found to possess three different types of Mo-oxide species, the concentrations of which were dependent on the Mo content: a highly dispersed tetra-coordinated monomeric molybdate, a tetra-coordinated dimeric and/or oligomeric molybdate, and a hexa-coordinated polymeric molybdate. Moreover, the tetra-coordinated molybdate species was observed to play a major role in the photocatalytic reduction of NO in the presence of CO to form N2 and CO2.

Original languageEnglish
Pages (from-to)272-278
Number of pages7
JournalJournal of Catalysis
Volume235
Issue number2
DOIs
Publication statusPublished - 2005 Oct 25

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All Science Journal Classification (ASJC) codes

  • Catalysis
  • Physical and Theoretical Chemistry

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