Abstract
The promotion of Co/SiO2 catalysts with noble metals such as Ru and Re substantially decreased the mean size of Co particles and increased the fraction of superparamagnetic particles. The Langevin function was used to approximate the magnetic field dependence of magnetization. This allowed the size of Co nanoparticles to be estimated. A decrease in the temperature of the reduction of Co/SiO2 in the presence of Ru and Re decreased the probability of the encapsulation of Co particles in carrier pores.
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