Oxidative Dimerization of Methane over Magnesium and Calcium Oxide Catalysts Promoted with Group IA Ions: The Role of [m+0”1 Centers

Chiu-Hsun Lin; Tomoyasu Ito; Ji xiang Wang; Jack H. Lunsford

doi:10.1021/ja00250a009

Oxidative Dimerization of Methane over Magnesium and Calcium Oxide Catalysts Promoted with Group IA Ions: The Role of [m⁺0”1 Centers

Chiu-Hsun Lin, Tomoyasu Ito, Ji xiang Wang, Jack H. Lunsford

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

120 Citations (Scopus)

Abstract

The oxidative dimerization of CH4 to C₂H₄and C₂H₆over MgO and CaO is strongly influenced by certain group IA ions which are employed as promoters. Lithium is an effective promoter for MgO, but sodium and potassium are not; all three group IA ions are effective promoters for CaO. Centers of the type [M⁺0“] (M⁺is a substitutional group IA ion) are present in each active and selective catalyst, which supports the hypothesis that these centers are active for the formation of CH₃* radicals and, therefore, in the overall oxidative dimerization reaction.

Original language	English
Pages (from-to)	4808-4810
Number of pages	3
Journal	Journal of the American Chemical Society
Volume	109
Issue number	16
DOIs	https://doi.org/10.1021/ja00250a009
Publication status	Published - 1987 Aug 1

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

Access to Document

10.1021/ja00250a009

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title = "Oxidative Dimerization of Methane over Magnesium and Calcium Oxide Catalysts Promoted with Group IA Ions: The Role of [m+0”1 Centers",

abstract = "The oxidative dimerization of CH4 to C2H4and C2H6over MgO and CaO is strongly influenced by certain group IA ions which are employed as promoters. Lithium is an effective promoter for MgO, but sodium and potassium are not; all three group IA ions are effective promoters for CaO. Centers of the type [M+0“] (M+is a substitutional group IA ion) are present in each active and selective catalyst, which supports the hypothesis that these centers are active for the formation of CH3* radicals and, therefore, in the overall oxidative dimerization reaction.",

author = "Chiu-Hsun Lin and Tomoyasu Ito and Wang, {Ji xiang} and Lunsford, {Jack H.}",

year = "1987",

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AU - Wang, Ji xiang

AU - Lunsford, Jack H.

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AB - The oxidative dimerization of CH4 to C2H4and C2H6over MgO and CaO is strongly influenced by certain group IA ions which are employed as promoters. Lithium is an effective promoter for MgO, but sodium and potassium are not; all three group IA ions are effective promoters for CaO. Centers of the type [M+0“] (M+is a substitutional group IA ion) are present in each active and selective catalyst, which supports the hypothesis that these centers are active for the formation of CH3* radicals and, therefore, in the overall oxidative dimerization reaction.

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