Effect of solvent on the hydrogenation of 4-phenyl-2-butanone over Pt based catalysts
Effect of solvent on the hydrogenation of 4-phenyl-2-butanone over Pt based catalysts
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DOI：
10.1016/j.jcat.2015.06.008
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发表时间：
2015-10-01
影响因子：
7.3
通讯作者：
Delgado, J. J.
中科院分区：
文献类型：
--
作者：
McManus, I.;Daly, H.;Delgado, J. J.
在Pt/TiO2和Pt/SiO2催化剂上进行了4-苯基-2-丁酮的加氢反应，并观察到溶剂对酮和芳香环加氢的选择性以及二氧化钛催化剂的总TOF有影响，而在二氧化硅负载催化剂上观察到的选择性没有溶剂影响，其中环加氢更有利。对于钛催化剂，烷烃有利于环氢化，而芳烃和醇有利于羰基氢化。提出了一种二元催化剂模型，其中芳香环氢化发生在金属位点上，而羰基氢化被认为主要发生在界面位点上，二氧化钛载体中的氧空位激活羰基。溶剂对钛催化剂上加氢反应的影响与溶剂与4-苯基-2-丁酮对活性位点的竞争有关。(C) 2015年作者。Elsevier Inc.出版。
The hydrogenation of 4-phenyl-2-butanone over Pt/TiO2 and Pt/SiO2 catalysts has been performed in a range of solvents and it has been observed that the solvent impacted on the selectivity of ketone and aromatic ring hydrogenation as well as the overall TOF of the titania catalyst with no solvent effect on selectivity observed using the silica supported catalyst where ring hydrogenation was favored. For the titania catalyst, alkanes were found to favor ring hydrogenation whereas aromatics and alcohols led to carbonyl hydrogenation. A two-site catalyst model is proposed whereby the aromatic ring hydrogenation occurs over the metal sites while carbonyl hydrogenation is thought to occur predominantly at interfacial sites, with oxygen vacancies in the titania support activating the carbonyl. The effect of the solvent on the hydrogenation reaction over the titania catalyst was related to competition for the active sites between solvent and 4-phenyl-2-butanone. (C) 2015 The Authors. Published by Elsevier Inc.