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Tellurium-doped lanthanum manganite as catalysts for the oxygen reduction reaction

Published online by Cambridge University Press:  09 April 2017

V. Celorrio
Affiliation:
School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, UK
L.J. Morris
Affiliation:
School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, UK EPSRC Centre for Doctoral Training in Catalysis, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK
M. Cattelan
Affiliation:
School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, UK
N.A. Fox
Affiliation:
School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, UK
D.J. Fermin*
Affiliation:
School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, UK
*
Address all correspondence to: D.J. Fermin at david.fermin@bristol.ac.uk
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Abstract

The effect of tellurium (Te) doping on the electrocatalytic activity of La1−x Tex MnO3 toward the oxygen reduction reaction is investigated for the first time. La1−x Tex MnO3 with x-values up 23% were synthesized from a single ionic liquid-based precursor, yielding nanoparticles with mean diameter in the range of 40–68 nm and rhombohedral unit cell. Electrochemical studies were performed on carbon-supported particles in alkaline environment. The composition dependence activity is discussed in terms of surface density of Mn sites and changes in the effective Mn oxidation state.

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Type
Research Letters
Copyright
Copyright © Materials Research Society 2017 

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