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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. (Publisher's Version)
In: Frontiers in Energy Research, 10, Frontiers Media S.A., e-ISSN 2296-598X,
DOI: 10.26083/tuprints-00022029,
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Item Type: Article
Origin: Secondary publication DeepGreen
Status: Publisher's Version
Title: High-entropy spinel-structure oxides as oxygen evolution reaction electrocatalyst
Language: English
Abstract:

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.

Journal or Publication Title: Frontiers in Energy Research
Volume of the journal: 10
Place of Publication: Darmstadt
Publisher: Frontiers Media S.A.
Collation: 11 Seiten
Uncontrolled Keywords: high-entropy materials, high-entropy spinels, catalysis, oxygen evolution reaction, electrocatalyst, nebulized spray pyrolysis
Classification DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
500 Naturwissenschaften und Mathematik > 540 Chemie
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials
Date Deposited: 26 Aug 2022 11:07
Last Modified: 31 Aug 2022 09:59
DOI: 10.26083/tuprints-00022029
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-220299
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/22029
PPN: 498729389
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