Magnetic NiFe 2 O 4 Nanoparticles Prepared via Non-Aqueous Microwave-Assisted Synthesis for Application in Electrocatalytic Water Oxidation.

Autor: Simon C; Department of Chemistry, University of Bayreuth, Universitaetsstrasse 30, 95447, Bayreuth, Germany., Zakaria MB; Inorganic Chemistry I, Ruhr-University Bochum, Universitaetsstrasse 150, 44801, Bochum, Germany.; Department of Chemistry, Faculty of Science, Tanta University, Tanta, 31527, Egypt., Kurz H; Department of Chemistry, University of Bayreuth, Universitaetsstrasse 30, 95447, Bayreuth, Germany., Tetzlaff D; Inorganic Chemistry I, Ruhr-University Bochum, Universitaetsstrasse 150, 44801, Bochum, Germany.; Fraunhofer Institute for Environmental, Safety, and Energy Technology, Osterfelder Strasse 3, 46047, Oberhausen, Germany., Blösser A; Department of Chemistry, University of Bayreuth, Universitaetsstrasse 30, 95447, Bayreuth, Germany., Weiss M; Department of Chemistry, University of Bayreuth, Universitaetsstrasse 30, 95447, Bayreuth, Germany., Timm J; Department of Chemistry, University of Bayreuth, Universitaetsstrasse 30, 95447, Bayreuth, Germany., Weber B; Department of Chemistry, University of Bayreuth, Universitaetsstrasse 30, 95447, Bayreuth, Germany., Apfel UP; Inorganic Chemistry I, Ruhr-University Bochum, Universitaetsstrasse 150, 44801, Bochum, Germany.; Fraunhofer Institute for Environmental, Safety, and Energy Technology, Osterfelder Strasse 3, 46047, Oberhausen, Germany., Marschall R; Department of Chemistry, University of Bayreuth, Universitaetsstrasse 30, 95447, Bayreuth, Germany.
Jazyk: angličtina
Zdroj: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2021 Dec 06; Vol. 27 (68), pp. 16990-17001. Date of Electronic Publication: 2021 Aug 04.
DOI: 10.1002/chem.202101716
Abstrakt: Phase-pure spinel-type magnetic nickel ferrite (NiFe 2 O 4 ) 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 NiFe 2 O 4 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 .
(© 2021 The Authors. Chemistry - A European Journal published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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