铜/二氧化硅催化剂中金属纳米粒子构性关系的一些认识

doi:10.1016/S1872-2067(19)63392-9

催化学报 ›› 2019, Vol. 40 ›› Issue (11): 1788-1794.DOI: 10.1016/S1872-2067(19)63392-9

铜/二氧化硅催化剂中金属纳米粒子构性关系的一些认识

Nicola Scotti^a, Elisabetta Finocchio^b, Claudio Evangelisti^a, Marcello Marelli^a, Rinaldo Psaro^a, Nicoletta Ravasio^a, Federica Zaccheria^a

a 国家研究委员会演技中心, 分子科学与技术研究所, 催化实验室, 20133 米兰, 意大利;
b 热那亚大学, 理工学院, 土木工程与环境化学系(DICCA), 16145 热那亚, 意大利

收稿日期:2019-03-28 修回日期:2019-05-08 出版日期:2019-11-18 发布日期:2019-09-06
通讯作者: Nicoletta Ravasio

Some insight on the structure/activity relationship of metal nanoparticles in Cu/SiO₂ catalysts

Nicola Scotti^a, Elisabetta Finocchio^b, Claudio Evangelisti^a, Marcello Marelli^a, Rinaldo Psaro^a, Nicoletta Ravasio^a, Federica Zaccheria^a

a The Institute of Molecular Science and Technologies (ISTM), CNR Research Centres, LabCat, via C. Golgi 19, 20133 Milano, Italy;
b Dip. Ingegneria Civile, Chimica e Ambientale (DICCA), Scuola Politecnica, Università di Genova, Via all'Opera Pia 15, 16145 Genova, Italy

Received:2019-03-28 Revised:2019-05-08 Online:2019-11-18 Published:2019-09-06
Contact: Nicoletta Ravasio

摘要/Abstract

摘要： 考察了化学吸附水解法制备的两种铜/二氧化硅催化剂上3-甲基环己酮加氢反应活性.发现两种催化剂在60℃和1 bar H₂下催化活性非常高.吸附CO红外光谱和透电镜结果表明，催化剂中存在结晶良好的铜颗粒.通过假设一个立方八面体模型，我们可以证明加氢活性与金属颗粒上的高配位点有关.本文还与蒸氨法制备的样品进行了比较，发现在相同的实验条件下，蒸氨法样品在加氢反应中没有活性.

关键词: 铜颗粒, 金属粒子形态, Lewis酸位, 加氢, 双功能催化剂

Abstract: The activity of two Cu/SiO₂ catalysts prepared by the chemisorption hydrolysis technique has been tested in the hydrogenation reaction of 3-methyl-cyclohexanone. Both catalysts were found to be very active at 60℃ and 1 atm of H². Characterization of the materials by FT-IR of adsorbed CO and TEM put in light the presence of well formed Cu cristallites. By assuming a cuboctahedral model we could show that the hydrogenation activity is linked to high coordination sites on the metal particle. A comparison is also reported with a sample prepared by ammonia evaporation that was found to be inactive in the hydrogenation reaction under the same experimental conditions.

Key words: Cu catalysts, Metal particle morphology, Lewis acid sites, Hydrogenation, Bifunctional catalysts

Nicola Scotti, Elisabetta Finocchio, Claudio Evangelisti, Marcello Marelli, Rinaldo Psaro, Nicoletta Ravasio, Federica Zaccheria. 铜/二氧化硅催化剂中金属纳米粒子构性关系的一些认识[J]. 催化学报, 2019, 40(11): 1788-1794.

Nicola Scotti, Elisabetta Finocchio, Claudio Evangelisti, Marcello Marelli, Rinaldo Psaro, Nicoletta Ravasio, Federica Zaccheria. Some insight on the structure/activity relationship of metal nanoparticles in Cu/SiO₂ catalysts[J]. Chinese Journal of Catalysis, 2019, 40(11): 1788-1794.

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铜/二氧化硅催化剂中金属纳米粒子构性关系的一些认识

Some insight on the structure/activity relationship of metal nanoparticles in Cu/SiO₂ catalysts

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铜/二氧化硅催化剂中金属纳米粒子构性关系的一些认识

Some insight on the structure/activity relationship of metal nanoparticles in Cu/SiO2 catalysts

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Some insight on the structure/activity relationship of metal nanoparticles in Cu/SiO₂ catalysts