(Elsevier, 2023) Pedroarena Apezteguía, Iván; Grande López, Lucía; Torrez Herrera, Jonathan Josué; Korili, Sophia A.; Gil Bravo, Antonio; Institute for Advanced Materials and Mathematics - INAMAT2; Gobierno de Navarra / Nafarroako Gobernua; Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa
Alumina-supported nickel catalysts are used to facilitate many reactions at various scales. However, the deactivation
of these catalysts is an important problem that has prompted the search for solutions such as the addition
of other metals that act as promoters. In this research, the interactions that form between the support and the
metals have been studied, a fundamental property that directly affects the performance of the catalyst. With this
idea, several Ni-Pd and Ni-Mo bimetallic and various Ni-Mo-Pd trimetallic samples have been prepared, and the
reduction capacity of the oxide phases by temperatura-programmed reduction has been analyzed and studied. It
has been found that in bimetallic catalysts, Pd favors the appearance of NiO species that are more easily reducible
than Mo. In the same way, the data obtained from the trimetallic simples suggest that the impregnation order of
Mo and Pd is not a determining factor in these catalysts. In addition, it has been found that the co-impregnation
of Ni with Pd gives better results than the sequential impregnation of these metals. The results obtained have also
shown that the order of nickel impregnation is decisive. In the case of Ni-Mo catalysts, by impregnating the
molybdenum first, catalysts with better reducing properties can be obtained.
