Synthesis of high performance electrocatalyst material for OER by hydrothermal method based on CoSnO3/rGO composite

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

Journal of Sol-Gel Science and Technology Pub Date : 2025-04-30 DOI:10.1007/s10971-025-06733-5

Areesha Khan, Soumaya Gouadria, Subhash Chandra, Jayanti Makasana, Suhas Ballal, T. Krithiga, Piyus Kumar Pathak, Rahul Raj Chaudhary, VL Mishra, Abhinav Kumar

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引用次数: 0

Abstract

The development of advanced electrocatalysts for oxygen evolution reaction (OER) is essential for improving effectiveness of electrocatalytic water splitting (EWS). Perovskite-type oxides acquired attention for their outstanding electrocatalytic capabilities in OER performance. This research involved the preparation of reduced graphene oxide (rGO) based perovskite CoSnO₃ material via basic hydrothermal technique to improve OER efficiency. The produced composite was tested by multiple analytical methods to evaluate its structural, surface area and compositional properties. CoSnO₃/rGO catalyst demonstrated a remarkable overpotential (η) of 209 mV at 10 mA cm⁻², along with Tafel slope (36 mV dec⁻¹), showcasing enhanced OER performance. Electrochemical surface area (ECSA) of CoSnO₃/rGO catalyst was obtained to be 642.5 cm², with enhanced cyclic durability of 35 h and least charge transfer resistance (R_ct) of 0.88 Ω. The outcomes indicated that incorporating rGO resulted in an increased surface area (SA), which enhanced conductivity and significantly improved the OER activity of the catalysts. The noteworthy electrochemical characteristics of CoSnO₃/rGO composite render it a superior material for applications in electrical and various other domains in the future.

Graphical Abstract

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基于CoSnO3/rGO复合材料的水热法制备高性能OER电催化剂材料

开发先进的析氧反应电催化剂是提高析氧反应电催化水分解效率的必要条件。钙钛矿型氧化物因其优异的电催化OER性能而备受关注。本研究采用基础水热技术制备还原氧化石墨烯（rGO）基钙钛矿CoSnO3材料，以提高OER效率。采用多种分析方法对制备的复合材料进行了结构、表面积和组成性能的测试。CoSnO3/rGO催化剂在10 mA cm−2下的过电位（η）为209 mV， Tafel斜率（36 mV dec−1）显著提高了OER性能。得到CoSnO3/rGO催化剂的电化学表面积（ECSA）为642.5 cm2，循环耐久性提高35 h，最小电荷转移阻力（Rct）为0.88 Ω。结果表明，加入还原氧化石墨烯可以增加催化剂的比表面积（SA），从而增强催化剂的导电性，并显著提高催化剂的OER活性。CoSnO3/rGO复合材料显著的电化学特性使其成为未来在电气和其他领域应用的优越材料。图形抽象

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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.