Two-step oxygen reduction on spinel NiFe2O4 catalyst: Rechargeable, aqueous solution- and gel-based, Zn-air batteries

Naik, KM and Sampath, S (2018) Two-step oxygen reduction on spinel NiFe2O4 catalyst: Rechargeable, aqueous solution- and gel-based, Zn-air batteries. In: Electrochimica Acta, 292 . pp. 268-275.

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Abstract

Electrocatalysts that lead to a four electron oxygen reduction reaction are generally proposed for metal-air batteries. Herein, we show that spinel NiFe2O4 catalyses oxygen reduction reaction by a two step process through stable peroxide species in aqueous medium. Further, it acts as an efficient bifunctional catalyst for oxygen reduction and oxygen evolution reactions with favourable rechargeable-battery characteristics. The kinetic parameters are deduced using electrochemical techniques. Rechargeable zinc-air batteries have been assembled using aqueous solution-as well as gel-based electrolytes and the battery characteristics are studied.

Item Type:	Journal Article
Publication:	Electrochimica Acta
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd
Keywords:	Electrocatalysts; Electrolytic reduction; Iron compounds; Nickel compounds; Oxygen; Solar cells; Solutions, Bi-functional catalysts; Bifunctional electrocatalysts; Electrochemical techniques; NiFe2O4; Oxygen evolution reaction; Oxygen Reduction; Oxygen reduction reaction; Rechargeable zinc-air batteries, Secondary batteries
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	02 Aug 2022 11:38
Last Modified:	02 Aug 2022 11:38
URI:	https://eprints.iisc.ac.in/id/eprint/75126

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