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2D high entropy perovskite oxides for electrocatalysis
Gonzalez, Sienna N.
Gonzalez, Sienna N.
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2025-04
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A major challenge for next generation dispatchable power sources is transitioning the electrocatalyst from platinum group metals to earth abundant materials while improving durability. The scientific community has found that careful manipulation of both composition and morphology has led to improvements in catalytic efficiency. Emphasis has been placed on the ability to synthesize nanoscale materials and specially-select both chemical composition and morphology of the final products. High entropy oxides (HEOs) (and, by extension, High Entropy Perovskites (HEPs)) are an exciting class of materials that afford earth abundance and tunability towards desired properties, making them an excellent candidate for use in electrocatalysis. This work presents the aerogel synthesis of Ba, Sr, Ca, Co, and Fe in the ABO3 perovskite structure, completed in an autoclave to promote nanomaterial production. Pseudo supercritical drying allowed for solvent removal while circumventing the kinetics of aggregation and the production of a powder product, ready for testing in Symmetric Solid Oxide Fuel Cells (SSOFCs).
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