Anthraquinone doped CoNi-MOF-74 composites as electrocatalysts for enhanced oxygen evolution reaction

IF 2.4 4区化学 Q3 CHEMISTRY, PHYSICAL

Ionics Pub Date : 2025-02-04 DOI:10.1007/s11581-025-06116-4

Jia Du, Lixuan Chen, Yiming Wu, Xin Wei, Jingyuan Jia, Kenan Sun, Bingke Li

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引用次数: 0

Abstract

Nowadays, the advancement of eco-friendly, clean, sustainable and renewable new energy has emerged as a research priority for scientists worldwide. Electrolytic water technology is founded on the principle of electrochemical or photoelectric decomposition of water, is deemed as one of the most promising and most feasible approaches to reach industrial production. Traditional OER (oxygen evolution reaction) electrocatalysts like IrO₂ and RuO₂ are beset by high costs and vulnerability to poisoning. Hence, it is essential to develop more economical, more stable and more efficient materials for the application of OER reactions. In this study, a series of AQ-doped (AQ = anthraquinone) MOF-74 materials were fabricated through a one-step solvothermal approach. The surface loading of the conjugated organic small molecule AQ on CoNi-MOF-74 is capable of effectively boosting the inadequate electrical conductivity of the bulk MOF material, thus significantly enhancing the performance of OER. The optimized ratio of material composition of AQ20@MOF-74 displayed significantly enhanced OER activity. with a lower overpotential of 272 mV at 10 mA cm⁻² and a smaller Tafel slope of 78 mV dec⁻¹. The research findings presented in this thesis provide a novel approach for the design and optimization of highly efficient OER electrocatalysts based on MOFs.

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蒽醌掺杂CoNi-MOF-74复合材料增强析氧反应的电催化剂研究

目前，开发环保、清洁、可持续、可再生的新能源已成为世界各国科学家研究的重点。电解水技术建立在水的电化学或光电分解原理的基础上，被认为是最有前途和最可行的达到工业生产的方法之一。IrO2、RuO2等传统的OER（析氧反应）电催化剂存在成本高、易中毒等问题。因此，为OER反应的应用开发更经济、更稳定、更高效的材料是至关重要的。本研究采用一步溶剂热法制备了一系列AQ掺杂（AQ =蒽醌）MOF-74材料。共轭有机小分子AQ在CoNi-MOF-74上的表面负载能够有效改善大块MOF材料的导电性不足，从而显著提高OER性能。优化后的材料组成比例AQ20@MOF-74的OER活性显著增强。在10 mA cm−2时过电位较低，为272 mV， Tafel斜率较小，为78 mV dec−1。本文的研究成果为基于MOFs的高效OER电催化剂的设计和优化提供了一种新的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ionics 化学-电化学

CiteScore

5.30

自引率

7.10%

发文量

427

审稿时长

2.2 months

期刊介绍： Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.