On the interface electron transport problem of highly active IrO<sub><i>x</i></sub> catalysts

Authors: Jeesoo Park, Dong Wook Lee, Jonghyun Hyun, Hojin Lee, Euntaek Oh, Kyunghwa Seok, Gisu Doo, Hee-Tak Kim

Published: 2025-04-28

DOI: 10.1039/d4ee05816j

Source: Full article

Abstract

Electron transport resistance increases with small iridium oxide catalysts due to ionomer-induced pinch-off effect at the catalyst layer and porous transport layer interface. Larger catalyst domains reduce resistance and improve performance.