Scalable novel electrocatalysts for water oxidation.
Aparna M Das a, Andrea Rogolino a, F. Pelayo García de Arquer a
a ICFO - Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Sitges, Barcelona, España, Sitges, Spain
nanoGe Fall Meeting
Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
#SolarFuels - Solar fuels through emerging system approaches
Barcelona, Spain, 2022 October 24th - 28th
Poster, Aparna M Das, 342
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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