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Catalytic combustion of methane over cobalt doped lanthanum stannate pyrochlore oxide

Paper ID Volume ID Publish Year Pages File Format Full-Text
52238 46867 2008 6 PDF Available
Title
Catalytic combustion of methane over cobalt doped lanthanum stannate pyrochlore oxide
Abstract

A series of La2CoxSn2−xO7−δ oxides with pyrochlore structure have been synthesized by the co-precipitation method as high-temperature catalysts for methane combustion. The dopant strongly influences the thermal stability and redox properties of these pyrochlores. IR measurements show that the Sn–O bond strength was weakened with increasing amount of Co doped in the La2Sn2O7, thus promoting the formation of oxygen vacancy. The reduction rates and the amount of oxygen vacancy would significantly affect catalytic activities of La2CoxSn2−xO7−δ in CH4 oxidation. Among the doped pyrochlores, La2Co0.3Sn1.7O7−δ and La2Co0.5Sn1.5O7−δ possessed optimum activities for methane combustion at low and high temperature, respectively.

Keywords
Methane; Catalytic combustion; Lanthanum stannate pyrochlore; Metal ion doping
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Catalytic combustion of methane over cobalt doped lanthanum stannate pyrochlore oxide
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 9, Issue 5, 20 March 2008, Pages 690–695
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
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