镍泡沫上镍铁基金属有机骨架纳米片的高效电化学水分解

IF 2.3 4区 化学 Q3 CHEMISTRY, PHYSICAL
Anlan Hu, Hanbing Li, Shijun Ran, Jie Huang, Muhammad Qasim, Kejian Lu, Kunpeng Ding, Jie Liu, Yupeng Qiao, Maochang Liu
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引用次数: 0

摘要

本文报道了以泡沫镍(NF)为导电衬底,采用一步溶剂热法合成三元过渡金属基金属有机骨架(MOF)材料NiCoFe-MIL53。所得的NiCoFe-MIL53/NF复合材料在电催化水分解中表现出高活性和优异的稳定性。研究发现,钴的掺入不仅提高了催化剂的导电性和本征催化活性,而且影响了合成产物的形貌。这种形态转变增加了电催化剂和电解质溶液之间的接触面积,从而提高了电催化性能。值得注意的是,优化后的NiCoFe-MIL53具有合适的Ni/Co/Fe质量比,在10 mA cm−2时过电位最低为206 mV,在碱性水溶液(1 M KOH)中析氧反应的Tafel斜率为21.09 mV dec−1。此外,该复合材料在整体水分解过程中也表现出优异的阴极和阳极反应电催化性能,在1.61 V的施加电位下实现了10 mA cm - 2的电流密度。这项工作强调了无贵金属mof基材料作为高活性和稳定的电催化水分解双功能催化剂的潜力。图形抽象
本文章由计算机程序翻译,如有差异,请以英文原文为准。
NiCoFe-Based Metal-Organic Framework Nanosheets on Ni Foam for High-Efficiency Electrochemical Water Splitting

We report the synthesis of a ternary transition metal-based metal-organic framework (MOF) material, NiCoFe-MIL53, using a one-step solvothermal method with nickel foam (NF) as a conductive substrate. The resulting composite, NiCoFe-MIL53/NF, exhibits high activity and excellent stability for electrocatalytic water splitting. It is found that incorporation of cobalt not only enhances the electrical conductivity and intrinsic catalytic activity of the catalyst, but also influences the morphology of the synthesized products. This morphological transformation increases the contact area between the electrocatalyst and the electrolyte solution, leading to an improved electrocatalytic performance. Notably, the optimized composition of NiCoFe-MIL53 with a proper mass ratio of Ni/Co/Fe requires the lowest overpotential of 206 mV at 10 mA cm− 2 and a Tafel slope of 21.09 mV dec− 1 for oxygen evolution reaction in alkaline aqueous solution (1 M KOH). Moreover, this composite also shows excellent electrocatalytic performance for both cathodic and anodic reactions during overall water splitting, achieving a current density of 10 mA cm− 2 at an applied potential of 1.61 V. This work highlights the potential of noble-metal-free MOF-based materials as dual-functional catalysts for highly active and stable electrocatalytic water splitting.

Graphical Abstract

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来源期刊
Catalysis Letters
Catalysis Letters 化学-物理化学
CiteScore
5.70
自引率
3.60%
发文量
327
审稿时长
1 months
期刊介绍: Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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