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

Stenzel, David ; Zhou, Bei ; Okafor, Chukwudalu ; Kante, Mohana Veeraju ; Lin, Ling ; Melinte, Georgian ; Bergfeldt, Thomas ; Botros, Miriam ; Hahn, Horst ; Breitung, Ben ; Schweidler, Simon (2022)
High-entropy spinel-structure oxides as oxygen evolution reaction electrocatalyst.
In: Frontiers in Energy Research, 2022, 10
doi: 10.26083/tuprints-00022029
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: High-entropy spinel-structure oxides as oxygen evolution reaction electrocatalyst
Language: English
Date: 26 August 2022
Place of Publication: Darmstadt
Year of primary publication: 2022
Publisher: Frontiers Media S.A.
Journal or Publication Title: Frontiers in Energy Research
Volume of the journal: 10
Collation: 11 Seiten
DOI: 10.26083/tuprints-00022029
Corresponding Links:
Origin: Secondary publication DeepGreen

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.

Uncontrolled Keywords: high-entropy materials, high-entropy spinels, catalysis, oxygen evolution reaction, electrocatalyst, nebulized spray pyrolysis
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-220299
Classification DDC: 500 Science and mathematics > 530 Physics
500 Science and mathematics > 540 Chemistry
600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials
Date Deposited: 26 Aug 2022 11:07
Last Modified: 14 Nov 2023 19:05
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/22029
PPN: 498729389
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