The design and construction of Co(OH)2@NiFe-MIL/NFF heterostructure catalyst for efficient and ultrastable water oxidation

IF 5.1 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nanoscale Pub Date : 2025-09-19 DOI:10.1039/d5nr03519h

Xianyu Chu, Li Jing, Yixuan Cheng, Yuhan He, Wei Jiang, Yuanyuan Wu, Yantao Sun, Chunbo Liu, Kenyu Cui, Guangbo Che

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引用次数: 0

Abstract

Metal-organic frameworks (MOFs) are regarded as intriguing candidates for oxygen evolution reaction (OER) in electrocatalytic water splitting due to their unique intrinsic features. However, the unsatisfactory catalytic activity and stability are the stumbling blocks to practical alkaline water electrolysis application. Herein, a facile strategy is deployed to fabricate heterostructured electrocatalyst composed of Co(OH)2 nanosheets and the in situ produced bimetallic MOF (NiFe-MIL) using ferronickel foam (NFF) as both the metal source and the conductive substrate. The hybrid Co(OH)₂@NiFe-MIL/NFF demonstrates superior OER electrocatalytic activity, achieving a low overpotential of 230 mV (at 10 mA cm⁻²), a minimal Tafel slope of 12.79 mV dec⁻¹, and exceptional long-term stability. The exceptional catalytic activity and stability stem from the synergistic effect of heterogeneous interfacial structure and multiple active sites. The work establishes a novel paradigm for designing advanced electrocatalysts through rational manipulation of electronic structure.

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Co(OH)2@NiFe-MIL/NFF异质结构高效超稳定水氧化催化剂的设计与构建

金属-有机骨架（MOFs）由于其独特的内在特性，被认为是电催化水分解过程中析氧反应（OER）的重要候选材料。然而，催化活性和稳定性不理想是制约碱性水电解实际应用的绊脚石。本文采用一种简单的策略，利用泡沫镍铁（NFF）作为金属源和导电衬底，制备由Co(OH)2纳米片和原位制备的双金属MOF （nfe - mil）组成的异质结构电催化剂。Co（OH）₂@ nfe - mil /NFF杂化物表现出优异的OER电催化活性，达到230 mV （10 mA cm⁻²）的低过电位，12.79 mV dec⁻²的最小塔菲尔斜率，以及出色的长期稳定性。其优异的催化活性和稳定性源于多相界面结构和多个活性位点的协同作用。这项工作为通过合理操纵电子结构来设计先进的电催化剂建立了一个新的范例。

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

Nanoscale CHEMISTRY, MULTIDISCIPLINARY-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

12.10

自引率

3.00%

发文量

1628

审稿时长

1.6 months

期刊介绍： Nanoscale is a high-impact international journal, publishing high-quality research across nanoscience and nanotechnology. Nanoscale publishes a full mix of research articles on experimental and theoretical work, including reviews, communications, and full papers.Highly interdisciplinary, this journal appeals to scientists, researchers and professionals interested in nanoscience and nanotechnology, quantum materials and quantum technology, including the areas of physics, chemistry, biology, medicine, materials, energy/environment, information technology, detection science, healthcare and drug discovery, and electronics.