	US 12,438,158 B2
	Electrocatalyst ink
Alejandro Martinez Bonastre, Reading (GB); and Daniel Marin Florido, Reading (GB)
Assigned to Johnson Matthey Hydrogen Technologies Limited, Reading (GB)
Appl. No. 18/558,666
Filed by JOHNSON MATTHEY HYDROGEN TECHNOLOGIES LIMITED, Reading (GB)
PCT Filed Jun. 8, 2022, PCT No. PCT/GB2022/051434 § 371(c)(1), (2) Date Nov. 2, 2023, PCT Pub. No. WO2022/258965, PCT Pub. Date Dec. 15, 2022.
Claims priority of application No. 2108369 (GB), filed on Jun. 11, 2021.
Prior Publication US 2024/0234748 A1, Jul. 11, 2024
Int. Cl. H01M 4/88 (2006.01); B01D 15/08 (2006.01); B01J 20/22 (2006.01); B01J 20/26 (2006.01); B01J 20/30 (2006.01); H01M 4/92 (2006.01); H01M 8/10 (2016.01)

CPC H01M 4/8828 (2013.01) [B01D 15/08 (2013.01); B01J 20/22 (2013.01); B01J 20/265 (2013.01); B01J 20/3085 (2013.01); H01M 4/8807 (2013.01); H01M 4/881 (2013.01); H01M 4/8814 (2013.01); H01M 4/921 (2013.01); H01M 4/926 (2013.01); H01M 2008/1095 (2013.01)]

18 Claims

1. A method of preparing an electrocatalyst ink, the method comprising the steps of:

i) preparing a dispersion comprising an electrocatalyst material, an ion-conducting material and a diluent; then

ii) contacting the dispersion with a separation material comprising picolinic acid ester or picolinic acid amide functional groups immobilised on a solid support.