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AMnO3 (A = Sr, La, Ca, Y) Perovskite Oxides as Oxygen Reduction Electrocatalysts

DOI: 10.1007/s11244-018-0886-5 DOI Help

Authors: V. Celorrio (University of Bristol) , L. Calvillo (Università di Padova) , G. Granozzi (Università di Padova,) , A. E. Russell (University of Southampton) , D. J. Fermin (University of Bristol)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Topics In Catalysis , VOL 41

State: Published (Approved)
Published: January 2018
Diamond Proposal Number(s): 10306

Open Access Open Access

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.

Journal Keywords: Perovskite; Manganite oxide; A-site; Oxygen reduction reaction; Catalytic activity

Subject Areas: Chemistry, Materials

Instruments: B18-Core EXAFS

Added On: 23/01/2018 12:13


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