US 12,142,404 B2
Hard-magnet L10-CoPt nanoparticles advance fuel cell catalysis
Shouheng Sun, East Greenwich, RI (US); and Junrui Li, Pullman, WA (US)
Assigned to BROWN UNIVERSITY, Providence, RI (US)
Appl. No. 17/284,318
Filed by Brown University, Providence, RI (US)
PCT Filed Oct. 15, 2019, PCT No. PCT/US2019/056309
§ 371(c)(1), (2) Date Aug. 23, 2021,
PCT Pub. No. WO2020/077359, PCT Pub. Date Apr. 16, 2020.
Claims priority of provisional application 62/745,003, filed on Oct. 12, 2018.
Prior Publication US 2022/0069317 A1, Mar. 3, 2022
Int. Cl. H01F 1/047 (2006.01); B22F 1/054 (2022.01); B22F 1/145 (2022.01); B22F 1/17 (2022.01); H01F 1/06 (2006.01); H01F 41/02 (2006.01); H01M 4/92 (2006.01); H01M 8/10 (2016.01)
CPC H01F 1/068 (2013.01) [B22F 1/054 (2022.01); B22F 1/145 (2022.01); B22F 1/17 (2022.01); H01F 1/047 (2013.01); H01F 41/0253 (2013.01); H01M 4/925 (2013.01); H01M 2008/1095 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method for producing L10-CoPt/Pt catalyst nanoparticles, the method comprising:
converting ˜9 nm-soft-magnet A1-CoPt nanoparticles into a hard-magnet L10-CoPt;
acid etching the hard-magnet L10-CoPt; and
annealing the acid etched hard-magnet L10-CoPt to generate a L10-CoPt/Pt catalyst.