High activity and durability of a Pt-Cu-Co ternary alloy electrocatalyst and its large-scale preparation for practical proton exchange membrane fuel cells

The large-scale synthesis of catalysts with promising performance and durability for oxygen reduction reaction (ORR) is essential to the industrialization of proton exchange membrane fuel cells (PEMFCs). Pt-based alloys prepared using the co-doping strategy have shown great promise. Herein, we report a co-doping tactic for producing high-performance Pt-Cu-Co ternary alloy catalysts on a mass scale. Cu and Co are doped into the material in one step and the co-doping of Cu and Co can optimize the electronic structure of Pt, thereby weakening the adsorption of oxygenated species with Pt to enhance ORR activity. The PtCu0.72Co0.01 and PtCu0.72Co0.01-10 g (scaled-up production) exhibit superior mass activity of 0.52 A mgPt- 1 and 0.43 A mgPt-1, respectively, and peak power density in H2-Air conditions of 1.15 W cm-2 and 1.01 W cm-2. Furthermore, the mass activity of catalysts was only attenuated by 8.3% and 9.5% after 30,000 cycles, indicating reasonably good durability.