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Journal article
Spinel-Structured High Entropy Oxides: Low Temperature Synthesis, Characterization, and Potential Applications
ACS omega, v 10(35), pp 39530-39539
25 Aug 2025
Featured in Collection : Research Supported by Drexel Libraries' OA Programs
Abstract
High entropy oxides (HEOs) have recently attracted increasing attention due to their remarkable properties and relatively low cost. Herein we report a simple, highly scalable, and low temperature method for synthesizing spinel (FeNiCoCuZn)3O4 (HEO). We heated an aqueous solution containing divalent cations in high alkali environments to temperatures of 25 - 95 °C for 24 h under atmospheric pressure. The HEO, synthesized at 95 °C for 24 h in 1 M KOH, was paramagnetic at room temperature, with a magnetic mass susceptibility of χ = (7.5 ± 0.2) × 10–7 m3·kg–1. It demonstrated stable electrochemical lithium storage performance, with a gravimetric capacity of ∼300 mAh·g–1 at 100 mA·g–1. It was also active in the electrocatalytic oxygen evolution reaction with an overpotential of 460 mV in alkaline media. The band gap energies were in the range of 2.4 eV. Our advancement in the synthesis and processing of transition metal-based HEOs will undoubtedly render them a viable solution for next generation materials for energy production and storage.
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Details
- Title
- Spinel-Structured High Entropy Oxides: Low Temperature Synthesis, Characterization, and Potential Applications
- Creators
- Irem Algan Simsek - Gazi UniversityHussein O. Badr (Corresponding Author) - Drexel UniversityNeal A Cardoza - Drexel University, Chemical and Biological EngineeringErika Colin-Ulloa - Worcester Polytechnic InstituteGregory Schwenk - Drexel University, Materials Science and EngineeringKaustubh Sudhakar - Drexel University, Materials Science and EngineeringUlf Wiedwald - University of Duisburg-EssenMichael Farle - University of Duisburg-EssenVibha Kalra - Cornell UniversityMohamed Ahmed Ibrahim Ibrahim - Drexel University, Materials Science and EngineeringLyubov Titova - Worcester Polytechnic InstituteMichel W Barsoum - Drexel University, Materials Science and Engineering
- Publication Details
- ACS omega, v 10(35), pp 39530-39539
- Publisher
- ACS Publications
- Number of pages
- 10
- Grant note
- Workforce Development for Teachers and Scientists: 2219 TUBITAK: DE-SC0012704 U.S. Department of Energy Office of Science User Facility, at Brookhaven National LaboratoryU.S. Department of Energy, Office of Science, Office of Workforce Development for Teachers and Scientists, Office of Science Graduate Student Research (SCGSR) program: DE-SC0014664 Oak Ridge Institute for Science and Education for the DOE: 405553726, CRC/TRR 270, A04 Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)
This work was supported by the TUBITAK 2219 International Postdoctoral Research Fellowship Program for Turkish Citizens. XRD, SEM, EDX, SAD, and TEM analyses were performed using instruments in the Materials Characterization Core at Drexel University. UV-vis research used the Materials Synthesis and Characterization facility of the Center for Functional Nanomaterials (CFN), which is a U.S. Department of Energy Office of Science User Facility, at Brookhaven National Laboratory under Contract No. DE-SC0012704. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Workforce Development for Teachers and Scientists, Office of Science Graduate Student Research (SCGSR) program. The SCGSR program is administered by the Oak Ridge Institute for Science and Education for the DOE under Contract No. DE-SC0014664. U.W. and M.F. thank the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - ProjectID 405553726 for funding within CRC/TRR 270, projects B02 and A04.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; Chemical and Biological Engineering
- Web of Science ID
- WOS:001556319800001
- Scopus ID
- 2-s2.0-105015971513
- Other Identifier
- 991022083455504721
InCites Highlights
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary