The effect of Ag and CeO2 distribution on SBA-15 surface on the activity of Ag–CeO2/SBA-15 catalysts in CO and methanol oxidation

N. N. Mikheeva, V. I. Zaikovskii, G. V. Mamontov

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2 Citations (Scopus)

Abstract

The series of catalysts representing the mesoporous ordered silica SBA-15 with supported silver or silver and ceria nanoparticles were synthesized by incipient wetness impregnation, characterized by the low-temperature N 2 adsorption, XRD, TEM HR, TPR-H 2 methods, and tested in the low-temperature CO oxidation and total oxidation of methanol. It was found that two types of silver particles are formed: small particles (<3 nm) inside the pores of the SBA-15 and larger particles (3–15 nm) on the external surface of SBA-15. High activity of the prepared catalyst in oxidation of CO and methanol is attributed to both small sizes of silver particles and the Ag–CeO 2 interaction. The distribution of both silver and ceria on the SBA-15 surface determines their interaction and, hence, enhances the catalytic activity in oxidative reactions due to the cooperation of active oxidative sites of silver and ceria at the Ag–CeO 2 interface. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)398-407
Number of pages10
JournalJournal of Sol-Gel Science and Technology
Volume92
Issue number2
DOIs
Publication statusPublished - 1 Nov 2019

Keywords

  • Catalysts
  • Ceria
  • Oxidation
  • SBA-15
  • Silver
  • Volatile organic compounds

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