In situ infrared spectroscopic study of CH4 oxidation over Co-ZSM-5

Mayfair C. Kung*, Sean S.Y. Lin, Harold H. Kung

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


Surface species formed in CH4 activation over Co-ZSM-5 were monitored by in situ DRIFT spectroscopy. IR absorption bands assigned to adsorbed methoxide, formate and polyoxymethylene were detected. The similarities in the IR bands and their evolution during He purge after reactions conducted under anaerobic and aerobic conditions suggested that Cannizzaro disproportionation of formaldehyde is a significant reaction pathway. This was verified when water was found to react with a surface species to form adsorbed formate. Continued formation of surface formate was observed during purging in He which indicated substantial surface storage of formaldehyde as polyoxymethylene.

Original languageEnglish (US)
Pages (from-to)108-115
Number of pages8
JournalTopics in Catalysis
Issue number1-2
StatePublished - Mar 2012


  • Cannizzaro reaction
  • Co-ZSM-5
  • Formaldehyde storage
  • Methane activation

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)


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