Fluorophosphates as Efficient Bifunctional Electrocatalysts for Metal-Air Batteries

Sharma, L and Gond, R and Senthilkumar, B and Roy, A and Barpanda, P (2020) Fluorophosphates as Efficient Bifunctional Electrocatalysts for Metal-Air Batteries. In: ACS Catalysis, 10 (1). pp. 43-50.

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Abstract

An efficient bifunctional catalyst still remains a stupendous challenge for the use of energy storage devices such as rechargeable metal-air batteries and fuel cells as the current electrocatalysts are either oxygen reduction reaction (ORR) or oxygen evolution reaction (OER) selective and suffer from cost and stability issues. Co-phosphate-based bifunctional materials can be a plausible option owing to the enhanced stability imparted by the phosphate group. Inspired by the possibility, we report solution combustion synthesized porous Na2CoPO4F as a bifunctional electrocatalyst. Comparable to the existing conventional electrocatalysts, porous Na2CoPO4F exhibits robust bifunctional (ORR/OER) properties. Having F-based chemistry, the dissolution is minimal in an aqueous medium, paving a way for its use as a cathode for the aqueous rechargeable hybrid Na-air battery. Thus, based on the bifunctional catalytic performances and stability in an aqueous medium, this material can be envisaged as a cheap and an efficient catalyst for fuel cell as well as a cathode for metal-air batteries.

Item Type:	Journal Article
Publication:	ACS Catalysis
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to American Chemical Society.
Keywords:	Cathodes; Cobalt compounds; Efficiency; Electrocatalysts; Electrolysis; Electrolytic reduction; Fuel cells; Fuel storage; Oxygen; Sodium compounds, Bi-functional; Bi-functional catalysts; Bifunctional electrocatalysts; Bifunctional materials; Catalytic performance; Fluoro-phosphates; Oxygen evolution reaction; Oxygen reduction reaction, Metal-air batteries
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	06 Feb 2023 10:16
Last Modified:	06 Feb 2023 10:16
URI:	https://eprints.iisc.ac.in/id/eprint/79940

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