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Oxygen evolution electrocatalytic properties of La substituted Na0.74CoO2 synthesized by sol-gel route.

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Bibliographic Details
Title: Oxygen evolution electrocatalytic properties of La substituted Na0.74CoO2 synthesized by sol-gel route.
Authors: Labidi, Chams Edoha1 (AUTHOR), Omari, Mahmoud1 (AUTHOR) m.omari@univ-biskra.dz, Omari, Elies1 (AUTHOR), Mebarki, Mourad2 (AUTHOR)
Source: Ceramics International. May2026:Part A, Vol. 52 Issue 13, p22002-22011. 10p.
Subjects: Electrocatalysts, Oxygen evolution reactions, Sol-gel processes, Water electrolysis, Electrochemical analysis, Lanthanum compounds
Abstract: This work focuses on developing highly effective and stable electrocatalysts for the oxygen evolution reaction, with the objective of contributing to solutions for current energy and environmental challenges. A-series La-substituted sodium cobaltate materials (0 ≤ x ≤ 0.3) were prepared using the sol-gel technique to examine the influence of A-site substitution on their electrocatalytic performance. XRD examination verifies the preservation of a hexagonal structure, with secondary phases emerging in the doped samples. The materials display a layered micro-plate morphology characterized by irregular forms and agglomerated powders. The NLC10 electrocatalyst exhibits remarkable OER performance, characterized by a low overpotential of 260 mV at 10 mA cm−2, a Tafel slope of 120 mV.dec−1, and remarkable stability over a duration of 20 h. The exceptional electrochemical properties of NLC10 highlight its potential as a promising electrocatalyst for future water-splitting applications. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:This work focuses on developing highly effective and stable electrocatalysts for the oxygen evolution reaction, with the objective of contributing to solutions for current energy and environmental challenges. A-series La-substituted sodium cobaltate materials (0 ≤ x ≤ 0.3) were prepared using the sol-gel technique to examine the influence of A-site substitution on their electrocatalytic performance. XRD examination verifies the preservation of a hexagonal structure, with secondary phases emerging in the doped samples. The materials display a layered micro-plate morphology characterized by irregular forms and agglomerated powders. The NLC10 electrocatalyst exhibits remarkable OER performance, characterized by a low overpotential of 260 mV at 10 mA cm−2, a Tafel slope of 120 mV.dec−1, and remarkable stability over a duration of 20 h. The exceptional electrochemical properties of NLC10 highlight its potential as a promising electrocatalyst for future water-splitting applications. [ABSTRACT FROM AUTHOR]
ISSN:02728842
DOI:10.1016/j.ceramint.2026.03.269