Rate and selectivity enhancements mediated by OH radicals in the oxidative coupling of methane catalyzed by Mn/Na2WO4/SiO2

Kazuhiro Takanabe*, Enrique Iglesia

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

Radically Improved: OH radicals formed by quasi-equilibrated steps on oxide surfaces introduce homogeneous pathways that lead to higher rates and C 2 yields in oxidative methane coupling relative to those attained by CH4 activation with chemisorbed oxygen (see picture; O*: dissociated oxygen atom; R: abstractor). The reactivity of OH. leads to a weaker influence of the C-H bond energies on the relative rates of H abstraction from CH4, C2H6, and C 2H4.

Original languageEnglish (US)
Pages (from-to)7689-7693
Number of pages5
JournalAngewandte Chemie - International Edition
Volume47
Issue number40
DOIs
StatePublished - Sep 22 2008

Keywords

  • Hydrogen abstraction
  • Kinetics
  • Oxidative coupling of methane
  • Radical reactions
  • Reaction mechanisms

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis

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