Origin of Limiting and Overlimiting Currents in Bipolar Membranes.

ABSTRACT: Bipolar membranes (BPMs), a special class of ion exchange membranes with the unique ability to electrochemically induce either water dissociation or recombination, are of growing interest for environmental applications including eliminating chemical dosage for pH adjustment, resource recovery, valorization of brines, and carbon capture. However, ion transport within BPMs, and particularly at its junction, has remained poorly understood. This work aims to theoretically and experimentally investigate ion transport in BPMs under both reverse and forward bias operation modes, taking into account the production or recombination of H⁺ and OH^-, as well as the transport of salt ions (e.g., Na⁺, Cl^-) inside the membrane. We adopt a model based on the Nern

SUBMITTER: Parnamae R 

PROVIDER: S-EPMC10324307 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature