Particle-size distribution of nickel dispersed on silica and its effects on hydrogenation of propionaldehyde
Particle-size distribution of nickel dispersed on silica and its effects on hydrogenation of propionaldehyde
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二氧化硅分散镍的粒径分布及其对丙醛加氢的影响
DOI：
10.1039/f19837900127
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
Y. Kotera
中科院分区：
文献类型：
--
作者：
A. Ueno;H. Suzuki;Y. Kotera
研究了控制负载型催化剂中金属颗粒大小的技术。镍的平均粒径随着催化剂中金属浓度的增加而增大，重量分数从2.2%到25.8%不等。金属颗粒大小对反应选择性的影响可以用金属微晶边角处金属原子的比例来解释。在丙醛与催化剂上的氢反应中，氢化可能发生在位于晶体边角的金属原子上，而醛的分解可能发生在位于晶体平面上的金属原子上。
Techniques to control metal particle size in a supported catalyst have been investigated. The mean particle size of nickel increases with an increase in the concentration of metal in the catalyst, varying from 2.2 to 25.8% in weight. The effects of metal particle size on reaction selectivity are explained in terms of the fraction of metal atoms located at the corners and edges in the metal crystallites. During the reaction of propionaldehyde with hydrogen on the catalyst, hydrogenation may occur on the metal atoms located at the corners or edges of the crystallites, while the decomposition of the aldehyde may take place on the metal atoms located on the plane surface of the crystallites.