Activating design of tunable CuCo2O4@NiMnO3 heterostructure towards superior oxygen evolution reaction

IF 2.3 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of Sol-Gel Science and Technology Pub Date : 2025-01-20 DOI:10.1007/s10971-024-06645-w

Adel El-marghany, Muhammad Khalil, Abdul Wahab Haroon, Fawad Ahmad, Ome Parkash Kumar, Abdul Ghafoor Abid, Shahroz Saleem, Zobia Siddique

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Abstract

The cost-effective electrocatalyst for oxygen evolution is an essential substitute for the growing energy needs as well as to energy conversion devices. The CuCo₂O₄@NiMnO₃ heterostructure is prepared by a one-step solvothermal method on stainless steel strip (SSS) support and was subsequently investigated for oxygen evolution reaction (OER). The hydrothermally developed metallic oxide electrocatalysts were confirmed by using several techniques to investigate physical features. The integration of Cu and Co with bimetallic NiMnO₃ has improved charge transfer capabilities by giving rise to active sites. The potential CuCo₂O₄@NiMnO₃ electrocatalyst demonstrated an overpotential of 134 mV, a lowered Tafel slope of 26.17 mVdec⁻¹, and a high turnover frequency of 0.06 s⁻¹ at the current density of 10 mA cm⁻². In addition, it shows that OER required a low operating potential of 1.48 V in 1 M KOH solution. Besides, CuCo₂O₄@NiMnO₃ heterostructure displays optimal free energy prerequisite for reactant adsorption, a substantial electroactive surface area of 33.1 cm⁻². Furthermore, it provides exceptional stability for 100 h in regulated electrolysis experiments with no discernible decrease in OER activity. This study offers a simple synthetic method for creating effective, low-cost, and binder-free electrocatalysts.

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来源期刊

Journal of Sol-Gel Science and Technology 工程技术-材料科学：硅酸盐

CiteScore

4.70

自引率

4.00%

发文量

280

审稿时长

2.1 months

期刊介绍： The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.