Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 16, Pages 13790-13797Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am503242v
Keywords
graphene oxide; bipolar membrane; interfacial layer; water dissociation; catalysis
Funding
- Natural Sciences and Engineering Research Council (NSERC) of Canada
- Canada Research Chair program
- Province of Manitoba's Science and Technology International Collaboration Fund
- University of Manitoba
- Canada Foundation for Innovation (CFI)
- Manitoba Research and Innovation Fund
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Bipolar membranes are formed by the lamination of an anion- and cation-exchange layer. Upon a sufficient applied reverse bias, water molecules at the layer junction dissociate, generating OH- and H+, which can be useful in electrodialysis and electrosynthesis applications. Graphene oxide has been introduced into bipolar membrane junctions (illustrated in the adjacent graphic) and is shown to be an efficient new water dissociation catalyst, lowering the overpotential by 75% compared to a control membrane. It was found that adjusting deposition conditions changes the nature of the graphene oxide films, leading to tunable membrane performance. Additionally, it is shown that their low overpotentials are stable, making for industrially viable, high-performance bipolar membranes.
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