This technology is a method for manufacturing a catalyst composite for fuel cells by forming a polydopamine coating on the surface of a non-conductive support, creating metal or metal oxide nanoparticles on top, and then carbonizing the polydopamine to convert it into conductive carbon. It also encompasses electrodes, fuel cells, and membrane electrode assemblies containing this catalyst composite.
Platinum, the most active material for fuel cell catalysts, has faced issues due to its high cost and limited reserves. Conventional supported catalysts have relied primarily on carbon supports, and there have been limitations in forming nanoparticles with high density and uniformity on durable non-conductive supports like silica or alumina.
This technology utilizes the surface modification capabilities of polydopamine to uniformly form 1–10 nm nanoparticles at high density even on non-conductive supports. The carbonized polydopamine creates an electrical conduction path between the support and the particles, enhancing the catalyst's electrical conductivity. Applicable to hydrogen fuel cell vehicles, distributed power generation fuel cell stacks, and membrane electrode assembly production, it enables catalyst designs that boost electrochemical reaction efficiency even with small amounts of precious metals.
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