Oxygen reduction on gold electrode in Li2CO3/K2CO3 (62/38 mol \%) molten electrolyte: experimental and simulation analysis / Nekrasov V. N.,Lystsov A. A.,Limanovskaya V,Batalov N. N.,Konopelko M. A. // ELECTROCHIMICA ACTA. - 2015. - V. 182, l. . - P. 61-66.

ISSN/EISSN:

0013-4686 / 1873-3859

Type:

Article

Abstract:

A kinetic model of oxygen reduction at an inert electrode in a carbonate melt has been proposed. Combined with the thermodynamic calculations of the chemical equilibria in the carbonate melts and with the diffusivity values taken from the literature, the model was used to simulate kinetics of oxygen reduction reaction at a gold electrode in the Li2CO3 / K2CO3 (62 / 38 mol \%) molten electrolyte under 0.33 O-2 + 0.67 CO2 atmosphere at 923 K for the case of coulostatic pulse perturbation. The simulation has shown that the partial exchange current of the O-2(-) reduction step makes the largest contribution to the overall exchange current, and neutralization of the oxide ion by CO2 controls the rate of the overall electrode process. The total exchange current per one-electron electrode reaction was estimated as 83 mA/cm(2). The simulation has demonstrated satisfactory agreement with the experiment. (C) 2015 Elsevier Ltd. All rights reserved.

Author keywords:

CARBONATE FUEL-CELL; PRESSURIZED CONDITIONS; MELTS; MCFC; TEMPERATURE; PERFORMANCE; MECHANISM; EQUILIBRIA; SOLUBILITY; KINETICS

DOI:

10.1016/j.electacta.2015.09.04

Web of Science ID:

ISI:000365075800007

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	NOV 10
Publisher	PERGAMON-ELSEVIER SCIENCE LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Language	English
EISSN	1873-3859
Keywords-Plus	CARBONATE FUEL-CELL; PRESSURIZED CONDITIONS; MELTS; MCFC; TEMPERATURE; PERFORMANCE; MECHANISM; EQUILIBRIA; SOLUBILITY; KINETICS
Research-Areas	Electrochemistry
Web-of-Science-Categories	Electrochemistry
Author-Email	m.konopelko@inbox.ru
Number-of-Cited-References	35
Usage-Count-Last-180-days	4
Usage-Count-Since-2013	14
Journal-ISO	Electrochim. Acta
Doc-Delivery-Number	CW5ZL