One-step solvothermal construction of 2D CoFe dual-MOF nanosheets for synergistically enhanced oxygen evolution reaction

Next Materials Pub Date : 2025-08-05 DOI:10.1016/j.nxmate.2025.101037

Zichen Xu , Yuanjuan Jiang , Jeng-Lung Chen , Lixia Qi , Ryan Yeh-Yung Lin , Limin Ren

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Abstract

Developing highly efficient electrocatalysts for oxygen evolution reaction is critical for sustainable energy technologies. Herein, a two-dimensional (2D) dual-metal-organic framework (dual-MOF) nanosheet electrocatalyst, denoted as CoFe-(74+88), is constructed via a facile one-pot synthesis method by integrating CoFe-MOF-74 and CoFe-MIL-88. Remarkably, the obtained CoFe-(74+88) exhibits superb electrocatalytic OER activity in 1.0 M KOH electrolyte, achieving an overpotential of 186 mV at 10 mA cm⁻², a Tafel slope of 38.7 mV dec⁻¹, and excellent long-term stability. The enhanced OER performance of CoFe-(74+88) can be attributed to the electronic reconfiguration and electronic interaction through the proper combination of two different MOFs and its unique 2D nanosheet structure with uniformly distributed nanoparticles, resulting in multiple positive synergistic effects to boost the electrocatalytic activity. This study provides a promising way for designing and synthesizing 2D MOF nanosheet electrocatalysts for energy-related applications.

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协同增强析氧反应的二维CoFe双mof纳米片一步溶剂热构建

开发高效的析氧电催化剂是实现可持续能源技术的关键。本文采用一锅合成法，将CoFe- mof -74和CoFe- mil -88整合，构建了二维（2D）双金属-有机框架（dual-MOF）纳米片电催化剂，表征为CoFe-(74+88)。值得注意的是，所得到的咖啡-(74+88)在1.0 M KOH电解质中表现出优异的电催化OER活性，在10 mA cm−2时达到186 mV的过电位，Tafel斜率为38.7 mV dec−1，并且具有优异的长期稳定性。CoFe-(74+88) OER性能的增强可归因于两种不同mof的适当组合及其独特的二维纳米片结构与均匀分布的纳米颗粒之间的电子重配置和电子相互作用，从而产生多种正协同效应，从而提高电催化活性。该研究为设计和合成用于能源相关应用的二维MOF纳米片电催化剂提供了一条有前景的途径。

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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