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Facile synthesis of BSCF perovskite oxide as an efficient bifunctional oxygen electrocatalyst

Azad, Uday Pratap and Singh, Monika and Ghosh, Sourav and Singh, Ashish Kumar and Ganesan, Vellaichamy and Singh, Akhilesh Kumar and Prakash, Rajiv (2018) Facile synthesis of BSCF perovskite oxide as an efficient bifunctional oxygen electrocatalyst. In: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 43 (45). pp. 20671-20679.

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Official URL: http://dx.doi.org/10.1016/j.ijhydene.2018.09.134

Abstract

We present a facile way to synthesize BSCF by using glycine-nitrate auto-combustion followed by annealing at different conditions, which work as high-performance bifunctional electrocatalyst for oxygen evolution (OER) as well as oxygen reduction (ORR) reactions in alkaline solution with comparatively better efficiency for OER. Annealing condition plays an important role towards catalytic performance due to morphological control and surface composition. Although, there is no significant change in onset potentials but these catalysts afford a current density >10 mA cm(-2) at the potential of 1.65 V for oxygen evolution reaction and a current density >2.5 mA cm(-2) at the potential of 0.009 V for oxygen reduction reaction with respect to RHE in 0.1 M KOH. The underlying mechanism for ORR and OER as well as catalytic activity differences were understood with the help of different analytical characterization techniques. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: copyright for this article belongs to PERGAMON-ELSEVIER SCIENCE LTD
Keywords: Electrocatalysis; Bifunctional; Oxygen evolution; Perovskite; Auto-ignition
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Depositing User: Id for Latest eprints
Date Deposited: 19 Dec 2018 13:50
Last Modified: 19 Dec 2018 13:50
URI: http://eprints.iisc.ac.in/id/eprint/61233

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