High-entropy spinel-structure oxides as oxygen evolution reaction electrocatalyst

Title data

Stenzel, David ; Zhou, Bei ; Okafor, Chukwudalu ; Kante, Mohana Veeraju ; Lin, Ling ; Melinte, Georgian ; Bergfeldt, Thomas ; Botros, Miriam ; Hahn, Horst ; Breitung, Ben ; Schweidler, Simon:
High-entropy spinel-structure oxides as oxygen evolution reaction electrocatalyst.
In: Frontiers in Energy Research. Vol. 10 (2022) . - No. 942314.
ISSN 2296-598X
DOI: https://doi.org/10.3389/fenrg.2022.942314

Official URL:

Abstract in another language

High-entropy oxides are an upcoming research topic due to their broad range of possible crystal structures and applications. In this work, we want to present the change in the catalytic properties when using different elements to create a high-entropy spinel. Therefore, we used the nebulized-spray pyrolysis to synthesize the high-entropy spinel (Mn0.2Fe0.2Ni0.2Mg0.2Zn0.2)3O4 and later on exchanged the Mg or the Zn with elements with multiple possible oxidation states, in our example each with Cr or Co. The phase purity, morphology, microstructure and homogeneity were investigated by XRD, SEM and STEM-EDX. Their electrocatalytic performance and stability was measured via oxygen evolution reaction and cyclic voltammetry and compared to IrO2, used as reference. The best performance of the synthesized materials was achieved by (Mn0.2Fe0.2Ni0.2Mg0.2Cr0.2)3O4.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Institutions of the University:	Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Lehrstuhl Anorganische Aktivmaterialien für elektrochemische Energiespeicher Research Institutions > Research Centres > Bayerisches Zentrum für Batterietechnik - BayBatt Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Research Institutions Research Institutions > Research Centres
Result of work at the UBT:	No
DDC Subjects:	500 Science > 500 Natural sciences 500 Science > 540 Chemistry 600 Technology, medicine, applied sciences > 600 Technology
Date Deposited:	03 Nov 2022 09:12
Last Modified:	03 Nov 2022 12:14
URI:	https://eref.uni-bayreuth.de/id/eprint/72642