Synthesis of perovskite-type high-entropy oxides as potential candidates for oxygen evolution

Schweidler, Simon and Tang, Yushu and Lin, Ling and Karkera, Guruprakash and Alsawaf, Alaa and Bernadet, Lucile and Breitung, Ben and Hahn, Horst and Fichtner, Maximilian and Tarancón, Albert and Botros, Miriam (2022) Synthesis of perovskite-type high-entropy oxides as potential candidates for oxygen evolution. Frontiers in Energy Research, 10. ISSN 2296-598X

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Abstract

High-entropy materials offer a wide range of possibilities for synthesizing new functional ceramics for different applications. Many synthesis methods have been explored to achieve a single-phase structure incorporating several different elements, yet a comparison between the synthesis methods is crucial to identify the new dimension such complex ceramics bring to material properties. As known for ceramic materials, the synthesis procedure usually has a significant influence on powder morphology, elemental distribution, particle size and powder processability. Properties that need to be tailored according to specific applications. Therefore, in this study perovskite-type high-entropy materials (Gd0.2La0.2–xSrxNd0.2Sm0.2Y0.2) (Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3 (x = 0 and x = 0.2) are synthesized for the first time using mechanochemical synthesis and a modified Pechini method. The comparison of different syntheses allows, not only tailoring of the constituent elements of high-entropy materials, but also to optimize the synthesis method as needed to overcome limitations of conventional ceramics. To exploit the novel materials for a variety of energy applications, their catalytic activity for oxygen evolution reaction was characterized. This paves the way for their integration into, e.g., regenerative fuel cells and metal air batteries.

Item Type: Article
Subjects: Open Research Librarians > Energy
Depositing User: Unnamed user with email support@open.researchlibrarians.com
Date Deposited: 09 May 2023 09:56
Last Modified: 23 Dec 2023 08:25
URI: http://stm.e4journal.com/id/eprint/883

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