US 12,244,020 B2
Method of producing platinum alloy catalyst using formation of carbon protective layer
Hyun Ju Kim, Seoul (KR); and Dong Yoon Shin, Gyeonggi-do (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Dec. 10, 2022, as Appl. No. 18/078,956.
Claims priority of application No. 10-2022-0043689 (KR), filed on Apr. 8, 2022.
Prior Publication US 2023/0327136 A1, Oct. 12, 2023
Int. Cl. H01M 4/86 (2006.01); H01M 4/88 (2006.01); H01M 4/92 (2006.01)
CPC H01M 4/8652 (2013.01) [H01M 4/8846 (2013.01); H01M 4/8882 (2013.01); H01M 4/926 (2013.01); H01M 2250/20 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method of producing a platinum alloy catalyst, comprising:
depositing a transition metal precursor on a platinum/carbon (Pt/C) catalyst comprising a platinum component and a carbon carrier;
adding a carbon component at the bottom of a reactor as separated by a separation membrane from the Pt/C catalyst thus deposited with the transition metal precursor;
performing heat treatment inside of the reactor;
forming a Pt-M/C catalyst coated with a carbon protective layer by passing a gas product generated from thermal decomposition of the carbon component through the separation membrane; and
removing the carbon protective layer from Pt-M/C catalyst by performing acid treatment on the carbon protective layer-coated Pt-M/C catalyst wherein the carbon protective layer is removed from the Pt-M/C catalyst.