Electrocatalytic activity of calcined manganese ferrite solid nanospheres in the oxygen reduction reaction
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Manganese ferriteManganese oxidation statesCarbon blackElectrocatalystOxygen reduction reaction
J.X. Flores-Lasluisa... [et al.]. Electrocatalytic activity of calcined manganese ferrite solid nanospheres in the oxygen reduction reaction, Environmental Research, Volume 204, Part B, 2022, 112126, ISSN 0013-9351, [https://doi.org/10.1016/j.envres.2021.112126]
SponsorshipInstituto de Salud Carlos III Spanish Government European Commission PID2019-105923RB-I00; MINECO BES-2017-081598; Spanish Government European Commission IJCI-2016-27636; Junta de Andalucia RNM366 RNM172
In this study, we synthesized MnFe2O4 solid nanospheres (MSN) calcined at different temperatures (200–500 ◦C) and MSN-based materials mixed with carbon black, for their use as electrocatalysts in the oxygen reduction reaction (ORR) in alkaline medium (0.1 M KOH). It was demonstrated that the calcination temperature of MSN material determined its chemical surface composition and microstructure and it had an important effect on the electrocatalytic properties for ORR, which in turn was reflected in the performance of MSN/CB-based electrocatalysts. The study revealed that the presence of Mn species plays a key role in the ORR activity. Among tested, MSN200/CB and MSN350/CB exhibited the best electrochemical performances together with outstanding stability.