Effect of Ba Content on the Activity of La1-xBaxMnO3 Towards the Oxygen Reduction Reaction

Gael P.A. Gobaille-Shaw; Veronica Celorrio; Laura Calvillo; Louis J. Morris; Gaetano Granozzi; David J. Fermín

doi:10.1002/celc.201800052

Effect of Ba Content on the Activity of La_1-xBa_xMnO₃ Towards the Oxygen Reduction Reaction

Gael P.A. Gobaille-Shaw, Veronica Celorrio^*, Laura Calvillo, Louis J. Morris, Gaetano Granozzi, David J. Fermín

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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Abstract

The electrocatalytic activity of La_1-xBa_xMnO₃ nanoparticles towards the oxygen reduction reaction (ORR) is investigated as a function of the A-site composition. Phase-pure oxide nanoparticles with a diameter in the range of 40 to 70 nm were prepared by using an ionic liquid route and deposited onto mesoporous carbon films. The structure and surface composition of the nanoparticles are probed by XRD, TEM, EDX, and XPS. Electrochemical studies carried out under alkaline conditions show a strong correlation between the activity of La_1-xBa_xMnO₃ and the effective number of reducible Mn sites at the catalysts layer. Our analysis demonstrates that, beyond controlling particle size and surface elemental segregation, understanding and controlling Mn coordination at the first atomic layer is crucial for increasing the performance of these materials.

Original language	English
Pages (from-to)	1922-1927
Number of pages	6
Journal	ChemElectroChem
Volume	5
Issue number	14
Early online date	6 Apr 2018
DOIs	https://doi.org/10.1002/celc.201800052
Publication status	Published - 11 Jul 2018

Keywords

Electrocatalysis
kinetics
LaBaMnO
oxygen reduction reaction
perovskite nanoparticles

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This is the final published version of the article (version of record). It first appeared online via Wiley at https://onlinelibrary.wiley.com/doi/full/10.1002/celc.201800052 . Please refer to any applicable terms of use of the publisher.
Final published version, 2.41 MBLicence: CC BY

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title = "Effect of Ba Content on the Activity of La1-xBaxMnO3 Towards the Oxygen Reduction Reaction",

abstract = "The electrocatalytic activity of La1-xBaxMnO3 nanoparticles towards the oxygen reduction reaction (ORR) is investigated as a function of the A-site composition. Phase-pure oxide nanoparticles with a diameter in the range of 40 to 70 nm were prepared by using an ionic liquid route and deposited onto mesoporous carbon films. The structure and surface composition of the nanoparticles are probed by XRD, TEM, EDX, and XPS. Electrochemical studies carried out under alkaline conditions show a strong correlation between the activity of La1-xBaxMnO3 and the effective number of reducible Mn sites at the catalysts layer. Our analysis demonstrates that, beyond controlling particle size and surface elemental segregation, understanding and controlling Mn coordination at the first atomic layer is crucial for increasing the performance of these materials.",

keywords = "Electrocatalysis, kinetics, LaBaMnO, oxygen reduction reaction, perovskite nanoparticles",

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AU - Gobaille-Shaw, Gael P.A.

AU - Celorrio, Veronica

AU - Calvillo, Laura

AU - Morris, Louis J.

AU - Granozzi, Gaetano

AU - Fermín, David J.

PY - 2018/7/11

Y1 - 2018/7/11

N2 - The electrocatalytic activity of La1-xBaxMnO3 nanoparticles towards the oxygen reduction reaction (ORR) is investigated as a function of the A-site composition. Phase-pure oxide nanoparticles with a diameter in the range of 40 to 70 nm were prepared by using an ionic liquid route and deposited onto mesoporous carbon films. The structure and surface composition of the nanoparticles are probed by XRD, TEM, EDX, and XPS. Electrochemical studies carried out under alkaline conditions show a strong correlation between the activity of La1-xBaxMnO3 and the effective number of reducible Mn sites at the catalysts layer. Our analysis demonstrates that, beyond controlling particle size and surface elemental segregation, understanding and controlling Mn coordination at the first atomic layer is crucial for increasing the performance of these materials.

AB - The electrocatalytic activity of La1-xBaxMnO3 nanoparticles towards the oxygen reduction reaction (ORR) is investigated as a function of the A-site composition. Phase-pure oxide nanoparticles with a diameter in the range of 40 to 70 nm were prepared by using an ionic liquid route and deposited onto mesoporous carbon films. The structure and surface composition of the nanoparticles are probed by XRD, TEM, EDX, and XPS. Electrochemical studies carried out under alkaline conditions show a strong correlation between the activity of La1-xBaxMnO3 and the effective number of reducible Mn sites at the catalysts layer. Our analysis demonstrates that, beyond controlling particle size and surface elemental segregation, understanding and controlling Mn coordination at the first atomic layer is crucial for increasing the performance of these materials.

KW - Electrocatalysis

KW - kinetics

KW - LaBaMnO

KW - oxygen reduction reaction

KW - perovskite nanoparticles

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U2 - 10.1002/celc.201800052

DO - 10.1002/celc.201800052

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AN - SCOPUS:85044862516

SN - 2196-0216

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SP - 1922

EP - 1927

JO - ChemElectroChem

JF - ChemElectroChem

IS - 14

ER -

Effect of Ba Content on the Activity of La_1-xBa_xMnO₃ Towards the Oxygen Reduction Reaction

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In situ XAS of non-Pt electrocatalysts for Oxygen Reduction Reaction

In-situ probing structure and electronic properties of transition metal oxide electrocatalysts

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Effect of Ba Content on the Activity of La1-xBaxMnO3 Towards the Oxygen Reduction Reaction

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In situ XAS of non-Pt electrocatalysts for Oxygen Reduction Reaction

In-situ probing structure and electronic properties of transition metal oxide electrocatalysts

Cite this

Effect of Ba Content on the Activity of La_1-xBa_xMnO₃ Towards the Oxygen Reduction Reaction