Hydrogenation of CO2, acetone, and CO on a Rh foil promoted by titania overlayers
Hydrogenation of CO2, acetone, and CO on a Rh foil promoted by titania overlayers
复制标题
DOI：
10.1007/bf00765181
复制
发表时间：
1990-05
影响因子：
2.8
通讯作者：
K. Williams;A. B. Boffa;J. Lahtinen;M. Salmeron;A. T. Bell;G. A. Somorjai
中科院分区：
文献类型：
--
作者：
K. Williams;A. B. Boffa;J. Lahtinen;M. Salmeron;A. T. Bell;G. A. Somorjai
研究了氧化钛亚单层沉积对Rh箔上CO2、丙酮和CO加氢的影响。研究发现，二氧化钛促进了这三种氢化反应，在0.5 ML的二氧化钛覆盖层上，每种反应的最大速率都达到了最大值。二氧化碳氢化的最大速率是裸Rh表面的15倍。丙酮加氢反应速率提高了6倍，CO加氢反应速率提高了3倍。在二氧化钛的促进下，每个反应的选择性也发生了变化。二氧化钛对这些反应的影响归因于C-O键与位于二氧化钛岛周缘的Ti3+离子之间的相互作用。
The effects of submonolayer deposits of titania on the hydrogenation of CO2, acetone, and CO on a Rh foil have been investigated. Titania has been found to promote all three of the hydrogenation reactions, with each reaction exhibiting a maximum rate at a titania coverage of 0.5 ML. The maximum rate for CO2hydrogenation is 15 times that of the bare Rh surface. Acetone hydrogenation shows a 6-fold rate enhancement, while CO displays a 3-fold increase. Changes in the selectivities for each reaction are also observed upon titania promotion. The effects of titania on these reactions are attributed to an interaction between C-O bonds and Ti3+ions located at the perimeter of titania islands.