be made of a single metal a dual alloy a multicomponent alloy or a combination thereof fig7 b is a diagram showing the transmission electron microscope tem result of the alloy particles being supported by the composed support of the catalyst according to the present invention the composed support includes the conductive support and the porous structure the conductive support is made of a conductive material which is preferably the conductive carbon material xc 72 with high surface area the porous structure could be made of the inorganic materials and is preferably a tio 2 nanotube doped with nitrogen atoms the rough surface of the tio 2 nanotube doped with nitrogen atoms facilitates the methanol solution to be close to the conductive support and to cause the oxidation thereof the distribution of the metallic nanoparticles is even and the size thereof is uniform which means that the metallic nanoparticles have a good absorption ability to the conductive support thereby the utilization ratio of the catalytic metal which is usually an expensive metal would be raised because of this advantage the amount of the metal required to be used is reduced further the cost of the catalysts for the fuel cells could be decreased by increasing the metallic surface that reacts with the fuel based on fig7 b it could be realized that there are pores and consecutive channels in the porous catalyst containing nitrogen atoms the porous structure avoiding the self aggregation of the catalytic metal is helpful to the distribution thereof and.