Ionic Transport Aspects of Water Electrolysis in Alkaline Media.

ABSTRACT: Water electrolysis is a key industrial process for producing green hydrogen. To avoid the use of noble metals and fluorinated polymer membranes, liquid water electrolysis is often carried out in alkaline conditions. It is common to distinguish between 3 processes: alkaline electrolysis at high electrolyte concentrations (≥7 M) with porous membranes, alkaline electrolysis at high electrolyte concentrations (≥7 M) with ion-solvating membranes, and alkaline electrolysis at moderate electrolyte concentrations (<2 M) with anion-exchange membranes. Here, we consider the fundamental aspects of water and ion fluxes and of conductivity across the 3 types of membranes. We discuss ionic currents governed by ion-ion interactions and those resulting from a Grotthuss mechanism. Furthermore, in the case

SUBMITTER: ElBachraoui F 

PROVIDER: S-EPMC12393796 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature