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AMnO3 (A = Sr, La, Ca, Y) perovskite oxides as oxygen reduction electrocatalysts

AMnO3 (A = Sr, La, Ca, Y) perovskite oxides as oxygen reduction electrocatalysts
AMnO3 (A = Sr, La, Ca, Y) perovskite oxides as oxygen reduction electrocatalysts

A series of perovskite-type manganites AMnO3 (A = Sr, La, Ca and Y) particles were investigated as electrocatalysts for the oxygen reduction reaction. AMnO3 materials were synthesized by means of an ionic-liquid method, yielding phase pure particles at different temperatures. Depending on the calcination temperature, particles with mean diameter between 20 and 150 nm were obtained. Bulk versus surface composition and structure are probed by X-ray photoelectron spectroscopy and extended X-ray absorption fine structure. Electrochemical studies were performed on composite carbon-oxide electrodes in alkaline environment. The electrocatalytic activity is discussed in terms of the effective Mn oxidation state, A:Mn particle surface ratio and the Mn–O distances.

A-site, Catalytic activity, Manganite oxide, Oxygen reduction reaction, Perovskite
1022-5528
1-8
Celorrio, V.
5ebb7fb5-a74c-4872-9795-5830dc915d0b
Calvillo, L.
05ff21ed-97ce-4ea4-9b73-f4c181be59b0
Granozzi, G.
e1561b71-a42d-4c72-9028-3fb07183fceb
Russell, A.E.
b6b7c748-efc1-4d5d-8a7a-8e4b69396169
Fermin, D.J.
3bfcec3e-75fc-487b-9367-ea8c805f4c0d
Celorrio, V.
5ebb7fb5-a74c-4872-9795-5830dc915d0b
Calvillo, L.
05ff21ed-97ce-4ea4-9b73-f4c181be59b0
Granozzi, G.
e1561b71-a42d-4c72-9028-3fb07183fceb
Russell, A.E.
b6b7c748-efc1-4d5d-8a7a-8e4b69396169
Fermin, D.J.
3bfcec3e-75fc-487b-9367-ea8c805f4c0d

Celorrio, V., Calvillo, L., Granozzi, G., Russell, A.E. and Fermin, D.J. (2018) AMnO3 (A = Sr, La, Ca, Y) perovskite oxides as oxygen reduction electrocatalysts. Topics in Catalysis, 1-8. (doi:10.1007/s11244-018-0886-5).

Record type: Article

Abstract

A series of perovskite-type manganites AMnO3 (A = Sr, La, Ca and Y) particles were investigated as electrocatalysts for the oxygen reduction reaction. AMnO3 materials were synthesized by means of an ionic-liquid method, yielding phase pure particles at different temperatures. Depending on the calcination temperature, particles with mean diameter between 20 and 150 nm were obtained. Bulk versus surface composition and structure are probed by X-ray photoelectron spectroscopy and extended X-ray absorption fine structure. Electrochemical studies were performed on composite carbon-oxide electrodes in alkaline environment. The electrocatalytic activity is discussed in terms of the effective Mn oxidation state, A:Mn particle surface ratio and the Mn–O distances.

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Accepted/In Press date: 16 January 2018
e-pub ahead of print date: 16 January 2018
Keywords: A-site, Catalytic activity, Manganite oxide, Oxygen reduction reaction, Perovskite

Identifiers

Local EPrints ID: 417434
URI: https://eprints.soton.ac.uk/id/eprint/417434
ISSN: 1022-5528
PURE UUID: 57fc0f5b-c43e-455c-ad52-1b2b8ad1b9ae
ORCID for A.E. Russell: ORCID iD orcid.org/0000-0002-8382-6443

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Date deposited: 31 Jan 2018 17:30
Last modified: 27 Feb 2018 17:31

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Contributors

Author: V. Celorrio
Author: L. Calvillo
Author: G. Granozzi
Author: A.E. Russell ORCID iD
Author: D.J. Fermin

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