Chinese Journal of Catalysis ›› 2019, Vol. 40 ›› Issue (11): 1788-1794.DOI: 10.1016/S1872-2067(19)63392-9

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

Nicola Scottia, Elisabetta Finocchiob, Claudio Evangelistia, Marcello Marellia, Rinaldo Psaroa, Nicoletta Ravasioa, Federica Zaccheriaa   

  1. 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

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