Ethylene hydrogenation and ethane hydrogenolysis on a Rh foil with titania overlayers
Ethylene hydrogenation and ethane hydrogenolysis on a Rh foil with titania overlayers
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带有二氧化钛覆盖层的 Rh 箔上的乙烯加氢和乙烷氢解
DOI：
10.1007/bf00774876
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发表时间：
1988
影响因子：
2.8
通讯作者：
G. A. Somorjai
中科院分区：
文献类型：
--
作者：
K. Williams;M. Levin;M. Salmeron;A. T. Bell;G. A. Somorjai
本文研究了在铑片上亚单层沉积二氧化钛对乙烯加氢和乙烷氢解反应的影响。已发现二氧化钛抑制Rh对两种反应的活性，并且每种反应的速率与暴露的Rh面积成比例。二氧化钛诱导的任何反应的活化能没有变化。此外，在H2中的高温还原不改变在二氧化钛覆盖的Rh箔上乙烷氢解的活化能。似乎二氧化钛覆盖层对H2、乙烯或乙烷的活化没有影响，并且对这些反应的活性的抑制纯粹是二氧化钛阻断活性位点的结果。
The effects of submonolayer deposits of titania on the hydrogenation of ethylene and the hydrogenolysis of ethane on a Rh foil have been investigated. Titania has been found to suppress the activity of Rh for both reactions, and the rate of each reaction is proportional to the exposed Rh area. Titania induces no change in the activation energy of either reaction. Furthermore, high temperature reduction in H2 does not change the activation energy for ethane hydrogenolysis on a titania-covered Rh foil. It appears that the titania overlayer has no effect on the activation of H2, ethylene, or ethane, and that the suppression of activity for these reactions is purely the result of titania blocking active sites.