Investigating the properties of perovskite oxide based electrocatalysts for oxygen evolution reaction (OER)

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

Journal of Sol-Gel Science and Technology Pub Date : 2024-11-24 DOI:10.1007/s10971-024-06616-1

Areej S. Alqarni, Arooj Fatima, Abhinav Kumar, A. Dahshan

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Abstract

Developing an efficient electrocatalyst for water splitting is imperative to improve the slow OER and store electrical energy as H₂ fuel. Creating an inexpensive development process for an effective OER electrocatalyst with features like a lot of active sites, a huge surface area (SA) and remarkable stability is vital for producing more H₂ and making it more widely available. We created the CoTiO₃/rGO nanocomposite using hydrothermal method in basic solution to improve OER kinetics. The morphological structure of the CoTiO₃/rGO was varied, showing CoTiO₃ nanoparticles anchored on rGO nanosheets to increase the electrolyte ions’ SA for adsorption. The CoTiO₃/rGO electrocatalyst performs better than CoTiO₃, as shown by its remarkable 38 h durability and overpotential (185 mV) at 10 mA/cm². Additionally, compared to CoTiO₃ (56 mV/dec), the CoTiO₃/rGO nanocomposite has a decreased Tafel slope (35 mV/dec). The larger SA and active site of the nanocomposite enhaned electrochemical characteristics of CoTiO₃/rGO nanocomposite. The combination of a metal oxide with material produced from carbon offers a promising first step toward making an exceptional electrocatalyst for use in water electrochemistry.

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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.