Research on the Electrocatalytic Hydrogen Evolution Performance of MoS2/NiSe2/CP Nano Composites

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-09-20 DOI:10.1007/s10562-025-05163-w

Xiaoran Guo, Haibo Wang, Qingzhu Sun, Yongchang Zhu, Qirong Li, Tao Tang

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Abstract

Two-dimensional layered molybdenum disulfide (MoS₂) is a catalyst for hydrogen production by hydrogen evolution reaction (HER). However, it exhibits has poor electronic conductivity and a high activation energy barrier for adsorption/dissociation of water molecules in the alkaline HER, which limits its application in alkaline HER. In this paper, MoS₂ was uniformly grown on three-dimensional conductive carbon paper (CP) by the hydrothermal method, presenting a nanoflower shape and effectively improving the conductivity of the electrode. Subsequently, NiSe₂ was grown onto MoS₂ nanoflowers in the form of nanoparticles by the secondary hydrothermal method to form a MoS₂/NiSe₂/CP nanocomposite structure. The structure and morphology of MoS₂/NiSe₂/CP were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results showed that MoS₂ was composed of nanoflower-like structures formed by the combination of thin nanosheets. The average diameter of the nanoflowers is approximately 1.3 ± 0.2 μm. NiSe₂ nanoparticles grew uniformly on the MoS₂ nanoflowers, with an average particle size of 30–100 nm, providing a larger specific surface area that exposes more reactive sites. The MoS₂/NiSe₂ heterointerface is conducive to electron redistribution, and the XPS peak shifts Mo 3d: + 0.4 eV; S 2p: + 0.3 eV. The synergistic architecture provides an electrochemical surface area (ECSA) higher than that of MoS2/CP. The introduction of NiSe₂ effectively inhibits the agglomeration of MoS₂, enhances the dispersion of the catalyst on the substrate, and increases the effective reaction area. The MoS₂/NiSe₂/CP was tested for HER with an overpotential of only 112 mV at a current density of − 10 m cm⁻² ang a Tafel slope of 42.01 mV dec⁻¹. The introduction of NiSe₂ nanoparticles effectively promoted the water adsorption/cracking reaction and thus co-catalyzed HER with MoS₂, demonstrating good stability.

Graphical Abstract

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MoS2/ nis2 /CP纳米复合材料电催化析氢性能研究

二维层状二硫化钼（MoS2）是析氢反应（HER）产氢催化剂。然而，它在碱性HER中表现出较差的电子导电性和较高的吸附/解离水分子的活化能势垒，限制了它在碱性HER中的应用。本文采用水热法在三维导电碳纸（CP）上均匀生长二硫化钼，呈现纳米花状，有效提高了电极的导电性。随后，通过二次水热法将NiSe2以纳米粒子的形式生长在MoS2纳米花上，形成MoS2/NiSe2/CP纳米复合结构。采用x射线衍射（XRD）、x射线光电子能谱（XPS）、扫描电镜（SEM）和透射电镜（TEM）对MoS2/ nis2 /CP的结构和形貌进行了表征。结果表明，二硫化钼是由纳米薄片组合而成的纳米花状结构。纳米花的平均直径约为1.3±0.2 μm。nis2纳米颗粒均匀生长在MoS2纳米花上，平均粒径为30-100 nm，提供了更大的比表面积，暴露了更多的反应位点。MoS2/NiSe2异质界面有利于电子再分配，XPS峰位移Mo 3d: + 0.4 eV；S 2p: + 0.3 eV。协同结构提供了比MoS2/CP更高的电化学表面积（ECSA）。nis2的引入有效抑制了MoS2的团聚，增强了催化剂在基体上的分散性，增加了有效反应面积。MoS2/ nis2 /CP在电流密度为−10 m cm−2时，过电位仅为112 mV，塔菲尔斜率为42.01 mV dec - 1。nis2纳米粒子的引入有效地促进了水吸附/裂化反应，从而与MoS2共催化HER，表现出良好的稳定性。图形抽象

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来源期刊

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.