caa a22 4500 475844416 CHVBK 20180406123909.0 cr unu---uuuuu 170329e20000701xx s 000 0 eng 10.1023/A:1009037006529 doi (NATIONALLICENCE)springer-10.1023/A:1009037006529 On the formation of cobalt-molybdenum sulfides in silica‐supported hydrotreating model catalysts [Elektronische Daten] [L. Coulier, V.H.J. de Beer, J.A.R. van Veen, J.W. Niemantsverdriet] Model catalysts, consisting of a conducting substrate with a thin SiO2 layer on top of which the active catalytic phase is deposited by spincoating impregnation, were applied to study the formation of the active CoMoS phase in HDS catalysts. The catalysts thus prepared showed representative activity in the hydrodesulfurization of thiophene, confirming that these models of HDS catalysts are realistic. Combination of the sulfidation behaviour of Co and Mo studied by XPS and activity measurements shows that the key in the formation of the CoMoS phase is the retardation of the sulfidation of Co. Complexing Co to nitrilotriacetic acid complexes retarded the Co sulfidation, resulting in the most active catalyst. Due to the retardation of Co in these catalysts, the sulfidation of Mo precedes that of Co, thereby creating the ideal conditions for CoMoS formation. In the CoMo catalyst without NTA the sulfidation of Co is also retarded due to a Co-Mo interaction. However, the sulfidation of Mo still lags behind that of Co, resulting in less active phase and a lower activity in thiophene HDS. Kluwer Academic Publishers, 2000 model catalysts nationallicence hydrodesulfurization nationallicence XPS nationallicence thiophene HDS activity nationallicence CoMo/SiO2 catalyst nationallicence Coulier L. Schuit Institute of Catalysis, Eindhoven University of Technology, 5600 MB, Eindhoven, The Netherlands aut de Beer V.H.J. Schuit Institute of Catalysis, Eindhoven University of Technology, 5600 MB, Eindhoven, The Netherlands aut van Veen J.A.R. Schuit Institute of Catalysis, Eindhoven University of Technology, 5600 MB, Eindhoven, The Netherlands aut Niemantsverdriet J.W. Schuit Institute of Catalysis, Eindhoven University of Technology, 5600 MB, Eindhoven, The Netherlands aut Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 13/1-2(2000-07-01), 99-108 1022-5528 13:1-2<99 2000 13 11244 https://doi.org/10.1023/A:1009037006529 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1009037006529 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Coulier L. Schuit Institute of Catalysis, Eindhoven University of Technology, 5600 MB, Eindhoven, The Netherlands aut NATIONALLICENCE 700 1- de Beer V.H.J. Schuit Institute of Catalysis, Eindhoven University of Technology, 5600 MB, Eindhoven, The Netherlands aut NATIONALLICENCE 700 1- van Veen J.A.R. Schuit Institute of Catalysis, Eindhoven University of Technology, 5600 MB, Eindhoven, The Netherlands aut NATIONALLICENCE 700 1- Niemantsverdriet J.W. Schuit Institute of Catalysis, Eindhoven University of Technology, 5600 MB, Eindhoven, The Netherlands aut NATIONALLICENCE 773 0- Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 13/1-2(2000-07-01), 99-108 1022-5528 13:1-2<99 2000 13 11244 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer