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Pt and Pt alloy electrocatalyst supported on graphite particles with controlled exposure to defined oxygen-reduction reaction (ORR) facets
Pt and Pt alloy electrocatalyst supported on graphite particles with controlled exposure to defined oxygen-reduction reaction (ORR) facets
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机译：负载在石墨颗粒上的Pt和Pt合金电催化剂，可控制地暴露于确定的氧还原反应（ORR）面
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摘要
One method of forming an electrocatalyst for fuel cell applications comprises electrolessly depositing a first plurality of nickel particles on carbon support particles. The nickel particles are formed from an aqueous solution containing nickel ion. At least some of the nickel particles are replaced by platinum by galvanic displacement reaction to form a second plurality of nickel particles coated with a layer of platinum. During this displacement reaction step, the nickel particles are heated to a temperature high enough to form the platinum layer. Finally, the second plurality of nickel particles are optionally incorporated into a cathode layer of a fuel cell.
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