期刊
JOURNAL OF MOLECULAR GRAPHICS & MODELLING
卷 65, 期 -, 页码 61-70出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jmgm.2016.02.007
关键词
Adsorption and dissociation; Hydrogenation; Heterogeneous catalysis; Cluster model; Density functional theory
类别
资金
- Academy of Finland through Centres of Excellence Program [284621]
Adsorption and dissociation of H-2 and hydrogenation of 1-pentyne on neutral and anionic Cum clusters have been investigated using the density functional theory and microkinetic modelling. Molecular adsorption of H-2 is found to occur strictly at atop sites. The H-2 dimer is activated upon adsorption, and the dissociation occurs with moderate energy barriers. The dissociated H atoms reside preferentially on 3-fold face and 2-fold edge sites. Based on these results, the reaction paths leading to the partial and total hydrogenation of 1-pentyne have been studied step-by-step. The results suggest that copper clusters can display selective activity on the hydrogenation of alkyne and alkene molecules. The hydrogenated products are more stable than the corresponding initial reactants following an energetic staircase with the number of added H atoms. Stable semi-hydrogenated intermediates are formed before the partial (1-pentene) and total (pentane) hydrogenation stages of 1-pentyne. The microkinetic model analysis shows that C5H10 is the dominant product. Increasing the reactants (C5H8/H-2) ratio enhances the formation of products (C5H10 and C5H12). (C) 2016 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据