Hard-Magnet L10-CoPt Nanoparticles Advance Fuel Cell Catalysis

By Junrui Li, Shubham Sharma, Xiaoming Liu, Y. Pan, J. Spendelow, M. Chi, Yukai Jia, Peng Zhang, David A. Cullen, Zheng Xi and 10 more. Joule, 2019

411 citations recorded by the source corpus.

Summary Stabilizing transition metals (M) in MPt alloy under acidic conditions is challenging, yet crucial to boost Pt catalysis toward oxygen reduction reaction (ORR). We synthesized ∼9 nm hard-magnet core/shell L10-CoPt/Pt nanoparticles with 2–3 atomic layers of strained Pt shell for ORR. At 60°C in acid, the hard-magnet L10-CoPt better stabilizes Co (5% loss after 24 hr) than soft-magnet A1-CoPt (34% loss in 7 hr). L10-CoPt/Pt achieves mass activities (MA) of 0.56 A/mgPt initially and 0.45 A/mgPt after 30,000 voltage cycles in the membrane electrode assembly at 80°C, exceeding the DOE 2020 targets on Pt activity and durability (0.44 A/mgPt in MA and

Subfields: Electrical and Electronic Engineering, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/5fa83e51ee46f585164eea285884850a617b01fe