A process for the preparation of a catalyst is provided, which comprises the steps of: (i) providing one or more support materials; (ii) providing one or more polymers on the support material; and (iii) providing one or more metals on the one or more supported polymers; wherein in step (ii) the one or more polymers do not comprise cross-linked polymers and/or polymers which have been reacted with a cross-linking agent. A catalyst obtained or obtainable according to said process and its use, in particular in a method for the treatment of automobile engine exhaust gas, are also provided.