Noble metal-free La0.80Sr0.20CoO3 thin film electrode for sodium formate electrooxidation

•Preparation of noble metal-free electrocatalyst as a thin film.•Detailed surface elemental analysis by XPS.•Aqueous solution of sodium formate along with the phosphate buffer used as electrolyte. A noble metal-free catalyst is prepared for formate electrooxidation. A nanoporous thin film electrode...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2022-06, Vol.915, p.116327, Article 116327
Main Authors: Vyas, Divya, Sharma, Sudhanshu
Format: Article
Language:English
Subjects:
Carbon monoxide poisoning
Cobalt oxides
Electrodes
Fluorine
Formate, LSCO
FTO
Lanthanum
Noble metals
Oxidation
Sodium
Strontium oxides
Substrates
Thin films
Tin oxides
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Summary:•Preparation of noble metal-free electrocatalyst as a thin film.•Detailed surface elemental analysis by XPS.•Aqueous solution of sodium formate along with the phosphate buffer used as electrolyte. A noble metal-free catalyst is prepared for formate electrooxidation. A nanoporous thin film electrode of strontium doped lanthanum cobalt oxide (LSCO), coated on fluorine-doped tin oxide (FTO) substrate is employed to study the electrocatalytic oxidation of sodium formate. A series of studies using cyclic voltammetry, chronoamperometry and gas-chromatography were performed to investigate the reactions. The formation of both CO and CO2 is observed in thegasanalysis.At1.8 V vs RHE, the current density of 4.0 mA.cm−2 is achieved in a solution of 0.5 M sodium formate and phosphate buffer (PBS, pH = 7). Thin-film electrode remains active for a long period showing a slow process of CO poisoning on the surface.
ISSN:1572-6657
1873-2569
DOI:10.1016/j.jelechem.2022.116327