Kinetics and Mechanism of Catalytic Partial Oxidation Reactions of Alkanes on Rhodium Surfaces

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• 作者：Jarod N. Wilson ; Ryan A. Pedigo ; Francisco Zaera
• 刊名：Journal of the American Chemical Society
• 出版年：2008
• 出版时间：November 26, 2008
• 年：2008
• 卷：130
• 期：47
• 页码：15796-15797
• 全文大小：155K
• 年卷期：v.130,no.47(November 26, 2008)
• ISSN：1520-5126

文摘

The kinetics of the partial oxidation of isobutane with molecular oxygen on Rh(111) single-crystal surfaces were studied by using a collimated molecular beam under ultrahigh vacuum conditions. Both hydrogen and water were shown to form as primary products, not after secondary reforming or water-gas shift steps as it has been suggested in the past. The production of carbon monoxide (but not of carbon dioxide) was also detected. Water production reaches its steady-state rate in a slower fashion than the rest of the products, presumably because of the kinetics of formation and consumption of the hydroxo surface intermediate involved.