Roll-to-Roll Fabrication of High Performance Fuel Cell Electrode with Core-Shell Catalyst Using Seeded Electrodes

摘要

A method for forming a fuel cell catalyst includes a step of forming an ionomer-containing layer including carbon particles and an ionomer. Tungsten-nickel alloy particles are formed on the carbon particles. At least a portion of the nickel in the tungsten-nickel alloy particles is replaced with palladium to form palladium-coated particles. The palladium-coated particles include a palladium shell covering the tungsten-nickel alloy particles. The palladium-coated particles are coated with platinum to form an electrode layer including core shell catalysts distributed therein.

主权项

1. A method for forming a fuel cell catalyst, the method comprising:
a) forming an ionomer-containing layer including carbon particles and an ionomer; b) forming tungsten-nickel alloy particles on the carbon particles; c) replacing at least a portion of the nickel in the tungsten-nickel alloy particles with palladium to form palladium-coated particles, the palladium-coated particles having a palladium shell covering the tungsten-nickel alloy particles; and d) coating the palladium-coated particles with platinum to form an electrode layer including core shell catalysts distributed therein.