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La 0.6 Sr 0.4 FeO 3‐ δ and La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3‐ δ Perovskite Materials for H 2 O 2 and Glucose Electrochemical Sensors
Author(s) -
Liotta L. F.,
Puleo F.,
La Parola V.,
Leonardi S. G.,
Donato N.,
Aloisio D.,
Neri G.
Publication year - 2015
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201400589
Subject(s) - x ray photoelectron spectroscopy , electrochemistry , cyclic voltammetry , materials science , analytical chemistry (journal) , catalysis , metal , alkaline earth metal , ferrite (magnet) , inorganic chemistry , transition metal , ion , nuclear chemistry , electrode , chemistry , metallurgy , chemical engineering , biochemistry , organic chemistry , chromatography , engineering , composite material
La x Sr 1‐ x Co y Fe 1‐ y O 3‐ δ perovskites were investigated as electro‐catalytic materials for H 2 O 2 and glucose electrochemical sensors. La 0.6 Sr 0.4 FeO 3‐ δ and La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3‐ δ formulations have been synthesized by citrate method and characterized by XRD and SEM. TPR and XPS analyses were performed to evaluate the oxidation states of metal ions and surface composition. The electrochemical performances of H 2 O 2 and glucose sensors fabricated by modifying commercial screen printed carbon electrodes with perovskites, were evaluated by cyclic voltammetry and amperometry in alkaline medium. Results demonstrated that the substitution of Fe with Co ions in the ferrite structure enhance the electrocatalytical activity towards the oxidation of H 2 O 2 and glucose.
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