Influence of polarization on the electrochemical activity of La2–xCaxNiO4+δ electrodes in contact with Ce0.8Sm0.2O1.9 electrolyte

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Influence of polarization on the electrochemical activity of La2–xCaxNiO4+δ electrodes in contact with Ce0.8Sm0.2O1.9 electrolyte. / Antonova, E.; Khodimchuk, A.; Tropin, E. et al.
In: International Journal of Hydrogen Energy, Vol. 48, No. 59, 01.07.2023, p. 22585-22593.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{014f1dd01f444d3d8236cf33a6b19b4a,

title = "Influence of polarization on the electrochemical activity of La2–xCaxNiO4+δ electrodes in contact with Ce0.8Sm0.2O1.9 electrolyte",

abstract = "The effect of electrode polarization on the electrochemical activity of La2NiO4+δ and La1.9Ca0.1NiO4+δ electrodes in contact with the Ce0.8Sm0.2O1.9 electrolyte is studied by impedance spectroscopy. It is found that anodic polarization facilitates electrode reaction for both electrodes leading to significant decrease in the polarization resistance. The effect of cathodic polarization differs between the electrodes: the polarization resistance of La2NiO4+δ electrode slightly increases, while the polarization resistance of La1.9Ca0.1NiO4+δ electrode strongly decreases with the increase in the applied potential. It is established that in all cases the polarization mostly affects the low-frequency stage of the electrode reaction, connected with oxygen surface exchange and diffusion. The surface state of the samples after exposure under polarization is studied by X-ray photoelectron spectroscopy. Correlations between electrochemical activity of the electrodes and the changes in their surface composition under polarization are discussed.",

author = "E. Antonova and A. Khodimchuk and E. Tropin and A. Fetisov and N. Porotnikova",

note = "Authors are grateful to government assignment No. 122020100324-3 by IHTE UB RAS and No. 122013100200-2 by IMET UB RAS. Authors are grateful to Dr. Farlenkov A.S. and Pankratov A.A. for assisting the study. The characterization of powder and ceramic materials was carried out at the Shared Access Centre “Composition of Compounds” of IHTE UB RAS.",

year = "2023",

month = jul,

day = "1",

doi = "10.1016/j.ijhydene.2023.01.343",

language = "English",

volume = "48",

pages = "22585--22593",

journal = "International Journal of Hydrogen Energy",

issn = "0360-3199",

publisher = "Elsevier",

number = "59",

}

RIS

TY - JOUR

T1 - Influence of polarization on the electrochemical activity of La2–xCaxNiO4+δ electrodes in contact with Ce0.8Sm0.2O1.9 electrolyte

AU - Antonova, E.

AU - Khodimchuk, A.

AU - Tropin, E.

AU - Fetisov, A.

AU - Porotnikova, N.

N1 - Authors are grateful to government assignment No. 122020100324-3 by IHTE UB RAS and No. 122013100200-2 by IMET UB RAS. Authors are grateful to Dr. Farlenkov A.S. and Pankratov A.A. for assisting the study. The characterization of powder and ceramic materials was carried out at the Shared Access Centre “Composition of Compounds” of IHTE UB RAS.

PY - 2023/7/1

Y1 - 2023/7/1

N2 - The effect of electrode polarization on the electrochemical activity of La2NiO4+δ and La1.9Ca0.1NiO4+δ electrodes in contact with the Ce0.8Sm0.2O1.9 electrolyte is studied by impedance spectroscopy. It is found that anodic polarization facilitates electrode reaction for both electrodes leading to significant decrease in the polarization resistance. The effect of cathodic polarization differs between the electrodes: the polarization resistance of La2NiO4+δ electrode slightly increases, while the polarization resistance of La1.9Ca0.1NiO4+δ electrode strongly decreases with the increase in the applied potential. It is established that in all cases the polarization mostly affects the low-frequency stage of the electrode reaction, connected with oxygen surface exchange and diffusion. The surface state of the samples after exposure under polarization is studied by X-ray photoelectron spectroscopy. Correlations between electrochemical activity of the electrodes and the changes in their surface composition under polarization are discussed.

AB - The effect of electrode polarization on the electrochemical activity of La2NiO4+δ and La1.9Ca0.1NiO4+δ electrodes in contact with the Ce0.8Sm0.2O1.9 electrolyte is studied by impedance spectroscopy. It is found that anodic polarization facilitates electrode reaction for both electrodes leading to significant decrease in the polarization resistance. The effect of cathodic polarization differs between the electrodes: the polarization resistance of La2NiO4+δ electrode slightly increases, while the polarization resistance of La1.9Ca0.1NiO4+δ electrode strongly decreases with the increase in the applied potential. It is established that in all cases the polarization mostly affects the low-frequency stage of the electrode reaction, connected with oxygen surface exchange and diffusion. The surface state of the samples after exposure under polarization is studied by X-ray photoelectron spectroscopy. Correlations between electrochemical activity of the electrodes and the changes in their surface composition under polarization are discussed.

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UR - https://elibrary.ru/item.asp?id=54354629

U2 - 10.1016/j.ijhydene.2023.01.343

DO - 10.1016/j.ijhydene.2023.01.343

M3 - Article

VL - 48

SP - 22585

EP - 22593

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 59

ER -

ID: 40638201