Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
Publication date: 11th July 2022
Scalable novel electrocatalysts for water oxidation
Water oxidation is one of the key reactions taking place at the anode of an
electrolyzer. Having scalable and cost-effective catalysts for Oxygen Evolution
Reaction (OER) is still a huge challenge and of great interest. Current Proton
Exchange Membrane (PEM) electrolyzers are based on iridium catalysts on the
anode side, as iridium combines the best activity and stability. Alternatives to
iridium (a rare Earth expensive metal) that have comparable activity and
stability are long sought after.
We investigate iridium-free catalysts for OER in acidic media and tune
their electronic and structural properties seeking to achieve long term stability
and high activity. Using scalable and simple synthesis techniques, we report a
wide range of compositions including activity modulators, which we screen
keeping in mind the favorable mechanisms required for an efficient and stable
OER catalyst. Incorporation of modulators uniformly in a matrix is challenging
to achieve the desired performance targets. We study the incorporation and role
of activity modulators on the performance of OER in acidic media.
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