Reactions of Fe+ and FeO+ with C2H2, C2H4, and C2H6: Temperature-Dependent Kinetics

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• 作者：Shaun G. Ard ; Joshua J. Melko ; Joseph A. Fournier ; Nicholas S. Shuman ; Albert A. Viggiano
• 刊名：Journal of Physical Chemistry A
• 出版年：2013
• 出版时间：October 10, 2013
• 年：2013
• 卷：117
• 期：40
• 页码：10178-10185
• 全文大小：349K
• 年卷期：v.117,no.40(October 10, 2013)
• ISSN：1520-5215

文摘

We present the first temperature-dependent rate constants and branching ratios for the reactions of Fe⁺ and FeO⁺ with C₂H₂, C₂H₄, and C₂H₆ from 170 to 700 K. Fe⁺ is observed to react only by association with the three hydrocarbons, with temperature dependencies of T^鈥? to T^鈥?. FeO⁺ reacts with C₂H₂ and C₂H₄ at the collision rate over the temperature range, and their respective product branchings show similar temperature dependences. In contrast, the reaction with ethane is collisional at 170 K but varies as T^鈥?.5, while the product branching remains essentially flat with temperature. These variations in reactivity are discussed in terms of the published reactive potential surfaces. The effectiveness of Fe⁺ as an oxygen-transfer catalyst toward the three hydrocarbons is also discussed.