Electrode kinetics at the Pt, O-2|La0.9Sr0.1ScO3-delta interface / Antonova E. P.,Bronin D. I. // JOURNAL OF SOLID STATE ELECTROCHEMISTRY. - 2017. - V. 21, l. 8. - P. 2457-2462.

ISSN/EISSN:

1432-8488 / 1433-0768

Type:

Article

Abstract:

Most of the ceramic proton conductors reveal considerable hole conductivity in an oxidizing ambient. This results in a necessity of taking into account the nonfaradaic current when studying the electrode kinetics in electrochemical cells with high-temperature protonic electrolytes. The present paper is an attempt to elucidate the electrode kinetics of oxygen reaction at a Pt, O-2|La0.9Sr0.1ScO3-delta (LSS10) interface. The polarization conductivity has been determined as a function of temperature (600-900 A degrees C) and oxygen partial pressure (2.1 x 10(4) > pO(2) > 1 Pa) by means of impedance spectroscopy using the elementary model in terms of an equivalent electrical circuit with the bypass resistance of hole transport in the electrolyte. Possible routes of oxygen reaction at the Pt, O-2|La0.9Sr0.1ScO3-delta interface have been discussed, and diffusion of the electron holes in LSS10 was proposed as the rate-determining stage of the electrode process.

Author keywords:

High-temperature proton conductor; Lanthanum scandate; Impedance; Electrode kinetics CERAMIC FUEL-CELLS; CONDUCTING ELECTROLYTES; IMPEDANCE SPECTROSCOPY; SOLID-ELECTROLYTE; MIXED CONDUCTORS; VERTICAL-BAR; OXYGEN; POLARIZATION; PLATINUM; EXCHANGE

DOI:

10.1007/s10008-017-3593-4

Web of Science ID:

ISI:000406177400031

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	AUG
Publisher	SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013 USA
Language	English
EISSN	1433-0768
Keywords-Plus	CERAMIC FUEL-CELLS; CONDUCTING ELECTROLYTES; IMPEDANCE SPECTROSCOPY; SOLID-ELECTROLYTE; MIXED CONDUCTORS; VERTICAL-BAR; OXYGEN; POLARIZATION; PLATINUM; EXCHANGE
Research-Areas	Electrochemistry
Web-of-Science-Categories	Electrochemistry
Author-Email	antonova\_ek@list.ru
ResearcherID-Numbers	Antonova, Ekaterina/H-9313-2016
ORCID-Numbers	Antonova, Ekaterina/0000-0003-3902-4395
Funding-Acknowledgement	Russian Science Foundation {[}16-13-00053]; Government of the Russian Federation {[}02.A03.21.0006]
Funding-Text	The study was financially supported by the grant of the Russian Science Foundation, project no. 16-13-00053, and by Act 211 Government of the Russian Federation (agreement no. 02.A03.21.0006) using facilities of shared access center ``Composition of Compounds{''} of IHTE UB RAS.
Number-of-Cited-References	24
Usage-Count-Last-180-days	3
Usage-Count-Since-2013	3
Journal-ISO	J. Solid State Electrochem.
Doc-Delivery-Number	FB5JN