Kinetics of oxygen evolution reaction in soluble lead flow batteries
Kinetics of oxygen evolution reaction in soluble lead flow batteries
Kinetics of oxygen evolution reaction (OER) on PbO2 deposited glassy carbon disk electrode (GCD) in methane sulfonic acid (MSA) is analyzed with cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), for soluble lead flow battery (SLFB) applications. The effect of concentration of active species (Pb2+), and the electrolyte (MSA) on the OER at the deposited PbO2 layer is investigated. The apparent activation energy of the OER on PbO2, deposited at various overpotential, is obtained from the Arrhenius and Eyring analysis. The apparent activation energy follows a special trend that it increases with overpotential, reaches a maximum and decreases thereafter. This is consistent with the PbO2 specifically deposited from low concentration of MSA (<1M), where the gel layer composed of hydrated PbO(OH)2 is also found. It is observed that low MSA concentration is preferred for limiting the OER at the positive electrode.
Redox flow battery, Oxygen evolution reaction, Arrhenius curve, electrochemical impedance spectroscopy, enthalpy of activation
Joy, Miji E.
7580e441-f924-4097-a051-4f71ad946cf1
Vivekanand,
8e83cc2a-f22b-41ac-942c-0213ff3539e9
Wills, Richard G.A.
60b7c98f-eced-4b11-aad9-fd2484e26c2c
Neergat, Manoj
be0e36a3-ce05-4679-85cd-6f227689919a
12 December 2024
Joy, Miji E.
7580e441-f924-4097-a051-4f71ad946cf1
Vivekanand,
8e83cc2a-f22b-41ac-942c-0213ff3539e9
Wills, Richard G.A.
60b7c98f-eced-4b11-aad9-fd2484e26c2c
Neergat, Manoj
be0e36a3-ce05-4679-85cd-6f227689919a
Joy, Miji E., Vivekanand, , Wills, Richard G.A. and Neergat, Manoj
(2024)
Kinetics of oxygen evolution reaction in soluble lead flow batteries.
Journal of the Electrochemical Society, 171 (12), [120505].
(doi:10.1149/1945-7111/ad9a04).
Abstract
Kinetics of oxygen evolution reaction (OER) on PbO2 deposited glassy carbon disk electrode (GCD) in methane sulfonic acid (MSA) is analyzed with cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), for soluble lead flow battery (SLFB) applications. The effect of concentration of active species (Pb2+), and the electrolyte (MSA) on the OER at the deposited PbO2 layer is investigated. The apparent activation energy of the OER on PbO2, deposited at various overpotential, is obtained from the Arrhenius and Eyring analysis. The apparent activation energy follows a special trend that it increases with overpotential, reaches a maximum and decreases thereafter. This is consistent with the PbO2 specifically deposited from low concentration of MSA (<1M), where the gel layer composed of hydrated PbO(OH)2 is also found. It is observed that low MSA concentration is preferred for limiting the OER at the positive electrode.
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Published date: 12 December 2024
Keywords:
Redox flow battery, Oxygen evolution reaction, Arrhenius curve, electrochemical impedance spectroscopy, enthalpy of activation
Identifiers
Local EPrints ID: 498206
URI: http://eprints.soton.ac.uk/id/eprint/498206
ISSN: 0013-4651
PURE UUID: 22742e68-69bb-42fc-b8f3-f1eb789e543a
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Date deposited: 12 Feb 2025 17:44
Last modified: 13 Feb 2025 02:39
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Author:
Miji E. Joy
Author:
Vivekanand
Author:
Manoj Neergat
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