Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3‐δ  Perovskite Activity towards the Oxygen Reduction Reaction in Alkaline Media | Zendy

Fabbri Emiliana | Zendy; Mohamed Rhiyaad | Zendy; Levecque Pieter | Zendy; Conrad Olaf | Zendy; Kötz Rüdiger | Zendy; Schmidt Thomas J. | Zendy

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Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3‐δ Perovskite Activity towards the Oxygen Reduction Reaction in Alkaline Media

Author(s) -

Fabbri Emiliana,

Mohamed Rhiyaad,

Levecque Pieter,

Conrad Olaf,

Kötz Rüdiger,

Schmidt Thomas J.

Publication year - 2014

Publication title -

chemelectrochem

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 59

ISSN - 2196-0216

DOI - 10.1002/celc.201300157

Subject(s) - perovskite (structure) , oxygen reduction reaction , oxygen , rotating disk electrode , electrode , catalysis , inorganic chemistry , materials science , reduction (mathematics) , chemistry , analytical chemistry (journal) , electrochemistry , cyclic voltammetry , crystallography , organic chemistry , geometry , mathematics

Perovskite catalysts: Cyclic voltammograms in Ar‐ and O 2 ‐saturated KOH reveal that the onset for the oxygen reduction reaction (ORR) occurs at potentials below ∼0.77 V RHE . Rotating ring‐disk electrode measurements and Koutecky–Levich analysis prove that for Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3‐δ , the ORR does not fully proceed via a four‐electron process, leading to the parallel formation of OH − and HO 2 − (see picture).

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