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Magnetic NiFe2O4 Nanoparticles Prepared via Non-Aqueous Microwave-Assisted Synthesis for Application in Electrocatalytic Water Oxidation

Title data

Simon, Christopher ; Zakaria, Mohamed Barakat ; Kurz, Hannah ; Tetzlaff, David ; Blößer, André ; Weiß, Morten ; Timm, Jana ; Weber, Birgit ; Apfel, Ulf-Peter ; Marschall, Roland:
Magnetic NiFe2O4 Nanoparticles Prepared via Non-Aqueous Microwave-Assisted Synthesis for Application in Electrocatalytic Water Oxidation.
In: Chemistry : a European Journal. Vol. 27 (July 2021) .
ISSN 1521-3765
DOI: https://doi.org/10.1002/chem.202101716

Abstract in another language

Phase-pure spinel-type magnetic nickel ferrite (NiFe2O4) nanocrystals in the size range of 4 to 11 nm were successfully synthesized by a fast and energy-saving microwave-assisted approach. Size and accessible surface areas can be tuned precisely by the reaction parameters. Our results highlight the correlation between size, degree of inversion, and magnetic characteristics of NiFe2O4 nanoparticles, which enables fine-tuning of these parameters for a particular application without changing the elemental composition. Moreover, the application potential of the synthesized powders for the electrocatalytic oxygen evolution reaction in alkaline media was demonstrated, showing that a low degree of inversion is beneficial for the overall performance. The most active sample reaches an overpotential of 380 mV for water oxidation at 10 mA cm−2 and 38.8 mA cm−2 at 1.7 V vs. RHE, combined with a low Tafel slope of 63 mV dec−1.

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 > Chair Inorganic Chemistry IV > Chair Inorganic Chemistry IV - Univ.-Prof. Dr. Birgit Weber
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 16 Sep 2021 12:24
Last Modified: 16 Sep 2021 12:24
URI: https://eref.uni-bayreuth.de/id/eprint/67047