Electrochimica Acta, volume 398, pages 139257

Interfacial recharging behavior of mixed Co, Mn-based perovskite oxides

Publication typeJournal Article
Publication date2021-12-01
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor6.6
ISSN00134686
General Chemical Engineering
Electrochemistry
Abstract
We report the voltammetric and soft X-ray absorption spectroscopy (XAS) data for two series of perovskite oxides, namely La 1− y Sr y Mn 0.5 Co 0.5 O 3− δ with a constant Mn:Co ratio and variable extent of Sr doping, and Sr 0.5 Gd 0.5 Mn x Co 1− x O 3− δ perovskite oxides with a constant Sr content but variable extent of the Co doping. The essential differences in the values and scan rate dependences of the total charges observed between the studied materials in alkaline solutions in the potential regions of their stability are interpreted on the basis of separation of the ‘fast’ and ‘slow’ recharging components. Our analysis of the total charge is based on two approaches, the first proposed by Trasatti, the second by Conway. The ‘slow’ charge is assigned to the oxygen intercalation in sub-surface oxide layers. We demonstrate correlations of the ‘fast’ and the ‘slow’ recharging components with the electronic state of Mn, Co and O determined from spectroscopic data. We also present the arguments in favor of possible contribution of the interfacial oxygen vacancies to the ‘fast’ interfacial recharging. These findings may be useful for understanding correlations of the composition and stoichiometry of the oxides on the one hand, and their electrocatalytic activity on the other.

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Filimonenkov I. S. et al. Interfacial recharging behavior of mixed Co, Mn-based perovskite oxides // Electrochimica Acta. 2021. Vol. 398. p. 139257.
GOST all authors (up to 50) Copy
Filimonenkov I. S., Istomin S. Y., Rotonnelli B., Gallet J., Bournel F., Antipov E. V., Savinova E. R., Tsirlina G. A., Bournel F. Interfacial recharging behavior of mixed Co, Mn-based perovskite oxides // Electrochimica Acta. 2021. Vol. 398. p. 139257.
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RIS Copy
TY - JOUR
DO - 10.1016/j.electacta.2021.139257
UR - https://doi.org/10.1016%2Fj.electacta.2021.139257
TI - Interfacial recharging behavior of mixed Co, Mn-based perovskite oxides
T2 - Electrochimica Acta
AU - Filimonenkov, Ivan S
AU - Istomin, Sergey Ya.
AU - Rotonnelli, Benjamin
AU - Gallet, Jean-Jacques
AU - Bournel, Fabrice
AU - Antipov, Evgeny V.
AU - Savinova, Elena R.
AU - Tsirlina, Galina A
AU - Bournel, Fabrice
PY - 2021
DA - 2021/12/01 00:00:00
PB - Elsevier
SP - 139257
VL - 398
SN - 0013-4686
ER -
BibTex
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BibTex Copy
@article{2021_Filimonenkov
author = {Ivan S Filimonenkov and Sergey Ya. Istomin and Benjamin Rotonnelli and Jean-Jacques Gallet and Fabrice Bournel and Evgeny V. Antipov and Elena R. Savinova and Galina A Tsirlina and Fabrice Bournel},
title = {Interfacial recharging behavior of mixed Co, Mn-based perovskite oxides},
journal = {Electrochimica Acta},
year = {2021},
volume = {398},
publisher = {Elsevier},
month = {dec},
url = {https://doi.org/10.1016%2Fj.electacta.2021.139257},
pages = {139257},
doi = {10.1016/j.electacta.2021.139257}
}
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