Process of preparing catalyst supporting highly dispersed platinum particles

A process of preparing a catalyst, which comprises highly dispersed platinum particles, said process comprising the steps of:

• a. preparing a platinum containing solution by dissolving dinitrodiamine platinum in nitric acid;
• b. adding a supporting material for said platinum particles, in the catalyst, to the platinum containing solution;
• c. adding allyl alcohol and hydrazine hydrate to the platinum containing solutions;
• wherein a platinum containing reaction product of the dissolved dinitroamine platinum, the allyl alcohol and the hydrazine hydrate is deposited on said supporting material;
• and
• c. thermally treating the supporting material in a hydrogen-containing reduction gas, to reduce the reaction product to the platinum particles.