Radiolytic synthesis of pure and alloyed nickel microaggregates. Application to catalysis

Optimizing the experimental factors of the radiolytic synthesis leads to highly reduced colloid solutions, as well as supported aggregates (96 and 88% respectively) for pure Ni and for Ni-Pd and Ni-Pt particles. The radiolytic yields are relatively low for sols with the highest figure: G(reduction) = 3.0 ± 0.2 while they are very high during the first stages of reduction in the presence of silica support, then going down with further irradiation. Catalytic properties of these particles have been tested