Towards core-shell bifunctional catalyst particles for aqueous metal-air batteries: NiFe-layered double hydroxide nanoparticle coatings on gamma-MnO2 microparticles

Flegler A, Muessig S, Prieschl J, Mandel K, Sextl G (2017)

Publication Status: Published

Publication Type: Journal article

Publication year: 2017

Journal

Electrochimica Acta Elsevier

Publisher: PERGAMON-ELSEVIER SCIENCE LTD

Book Volume: 231

Pages Range: 216-222

DOI: 10.1016/j.electacta.2017.01.179

Abstract

Herein, we investigated the synthesis of a bifunctional catalyst particle system for aqueous metal-air batteries. To target a system which possesses both, oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) capabilities, gamma-MnO2 microparticles were combined with NiFe layered double hydroxides (LDH) to a core-shell system. NiFe-LDH can be optimized in its constituency to yield a very low onset potential (at 10 mA cm (2)) for the oxygen evolution reaction of only 569 mV vs. Hg/HgO. We investigated different coating processes (in-situ precipitation coating and sonochemical assisted coating) in order to create a bifunctional system of LDH shell@gamma-MnO2 core. It was found that the overall catalytic functionality of the bifunctional system strongly depends on the coating process, as this ultimately determines the surface nature and thus the behavior in ORR and OER reactions, respectively, of this core-shell system. (C) 2017 Elsevier Ltd. All rights reserved.

Authors with CRIS profile

Stephan Müssig Professur für Anorganische Chemie Karl Mandel

Involved external institutions

Julius-Maximilians-Universität Würzburg DE Germany (DE) Fraunhofer Institut für Silicatforschung (ISC) DE Germany (DE)

How to cite

APA:

Flegler, A., Muessig, S., Prieschl, J., Mandel, K., & Sextl, G. (2017). Towards core-shell bifunctional catalyst particles for aqueous metal-air batteries: NiFe-layered double hydroxide nanoparticle coatings on gamma-MnO2 microparticles. Electrochimica Acta, 231, 216-222. https://doi.org/10.1016/j.electacta.2017.01.179

MLA:

Flegler, Andreas, et al. "Towards core-shell bifunctional catalyst particles for aqueous metal-air batteries: NiFe-layered double hydroxide nanoparticle coatings on gamma-MnO2 microparticles." Electrochimica Acta 231 (2017): 216-222.

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