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

Kazuhiro Takanabe; Enrique Iglesia

doi:10.1002/anie.200802608

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 journal › Article › peer-review

108 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 language	English (US)
Pages (from-to)	7689-7693
Number of pages	5
Journal	Angewandte Chemie - International Edition
Volume	47
Issue number	40
DOIs	https://doi.org/10.1002/anie.200802608
State	Published - Sep 22 2008
Externally published	Yes

Keywords

Hydrogen abstraction
Kinetics
Oxidative coupling of methane
Radical reactions
Reaction mechanisms

ASJC Scopus subject areas

Catalysis
General Chemistry

Access to Document

10.1002/anie.200802608

Cite this

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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.",

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KW - Oxidative coupling of methane

KW - Radical reactions

KW - Reaction mechanisms

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