Ce0.8Sr0.2CoxFe1‐xO3‐δ (x=0.2, 0.5, 0.8) – A Perovskite‐type Nanocomposite for Application in the Oxygen Evolution Reaction in Alkaline Media

Three perovskite‐type nanocomposites, i. e. Ce0.8Sr0.2CoxFe1‐xO3‐δ (x=0.2, CSCF1; 0.5, CSCF2; 0.8, CSCF3), were synthesized employing the sol‐gel technique, subsequent to which they were physically and electrochemically evaluated for their electrocatalytic activity towards the oxygen evolution react...

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Bibliographic Details
Published in:Electroanalysis (New York, N.Y.) N.Y.), 2020-12, Vol.32 (12), p.3131-3144
Main Authors: Njoku, C. B., Doyle, B. P., Carleschi, E., Kriek, R. J.
Format: Article
Language:English
Subjects:
Mass Activity
Nanocomposite
Overpotential
Oxygen Evolution Reaction (OER)
Perovskite-type
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Summary:Three perovskite‐type nanocomposites, i. e. Ce0.8Sr0.2CoxFe1‐xO3‐δ (x=0.2, CSCF1; 0.5, CSCF2; 0.8, CSCF3), were synthesized employing the sol‐gel technique, subsequent to which they were physically and electrochemically evaluated for their electrocatalytic activity towards the oxygen evolution reaction (OER) in alkaline medium (0.1 M KOH) at room temperature (25 °C). Electrochemical characterisation revealed Ce0.8Sr0.2Co0.8Fe0.2O3‐δ (CSCF3) to be the most active having the lowest overpotential at 10 mA cm−2 (440 mV), the lowest Tafel slope (40.7 mV dec−1), the highest mass activity (20.11 mA mg−1) and highest specific activity (2.22 mA cm−2).
ISSN:1040-0397
1521-4109
DOI:10.1002/elan.202060370