NOVELTY - Metal nanocluster composite material preparation comprises treating porous zeolitic material with aqueous metal compound solution, heating and cooling metal ion-exchanged zeolitic material, contacting metal ion-exchanged zeolitic material with organic monomer, removing air from metal ion-exchanged zeolitic material using vacuum treatment, inducing polymerization of the monomer, and heating polymer composite material to greater than 350degreesC under non-oxidizing conditions.    USE - The method is useful for preparing metal nanocluster composite material used in as catalyst, e.g. in electro-oxidation of hydrogen and electro-reduction of oxygen in fuel cells and in commercialization of fuel cell powered vehicles.    ADVANTAGE - The method provides material is highly conductive carbon metal compound zeolite composite from which the zeolite can be optionally removed. The contacting of metal compound zeolite material with organic compound allows stabilization of metal compound nanoclusters and provides way for electrical conduction required for electrocatalyst. The removal of zeolite phase by acid or base treatment provides improvement in electro-activity of catalyst as measured by standard electrochemical techniques. The method allows nanocluster size to be controlled by controlling heat rate with slower heating rates to yield smaller sizes.    DETAILED DESCRIPTION - Metal nanocluster composite material preparation comprises treating a porous zeolitic material with an aqueous metal compound solution to form a metal ion-exchanged zeolitic material, heating the metal ion-exchanged zeolitic material at a temperature ramp rate of less than 2degreesC/minute to less than 400degreesC, cooling the metal ion-exchanged zeolitic material to 80degreesC, contacting the metal ion-exchanged zeolitic material with an organic monomer capable of undergoing polymerization, removing air from the metal ion-exchanged zeolitic material using vacuum treatment to allow the monomer to penetrate the porous zeolitic material to form a metal ion-exchanged zeolitic material and monomer composite material, inducing polymerization of the monomer, and heating the polymer composite material to greater than 350degreesC under non-oxidizing conditions to form a metal nanocluster-carbon composite material. The inducing of polymerization of monomer comprises heating the composite material to form a polymer composite material.