Proceedings of MATSUS Fall 2023 Conference (MATSUSFall23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.158
Publication date: 18th July 2023
One of the main challenges to tackle for the widespread adoption of proton exchange membrane fuel cells (PEMFCs) is minimise the use of PGM catalysts while keeping high activity and durability.
Great advances have been made in the fundamental understanding and experimental development of electrocatalysts [1]. One strategy to address this challenge consists in nano-engineering morphology and composition of the catalysts to increase their ORR mass activity and durability upon prolonged cycling. Another approach consists in the modification of the support material, which can bring enhanced stability to corrosion as well as promote electrocatalysis via interactions with the metal catalyst.
Our group is developing novel electrocatalysts and support materials to enhance performance and durability of PEMFC cathodes.
A range of chemical and electrochemical synthesis techniques to prepare Pt nanoparticles and thin films [2] are investigated to prepare highly active ultra-low PGM loaded electrodes. A solid-phase synthesis is used to prepare Pt-rare earth metal alloys of controlled stoichiometry [3, 4].
In parallel, we are developing functionalised carbons and metal oxide-based support materials with high corrosion resistance combined with electronic electrocatalyst-support interactions beneficial for activity and durability [5, 6]. The morphology of the supports also plays a crucial role. Nanostructured electrodes are prepared by electrospinning allowing control over structure and porosity [2, 5].
In this work, the advances in understanding the role of materials composition and architecture on electroactivity and durability of PEMFC cathodes will be presented.
The research leading to these results has received funding from the IMMORTAL project, which receives funding from the Fuel Cells and Hydrogen 2 Joint Undertaking (now Clean Hydrogen Partnership) under Grant Agreement No. 101006641. This Joint Undertaking receives support from the European Union's Horizon 2020 research and innovation programme, Hydrogen Europe and Hydrogen Europe Research.
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