掺入碲的镍铁层状双氢氧化物微晶的氧进化反应

IF 1.7 4区材料科学 Q3 CRYSTALLOGRAPHY

Journal of Crystal Growth Pub Date : 2024-10-11 DOI:10.1016/j.jcrysgro.2024.127918

Kyoungwon Cho , Hyun Cho , Jeong Ho Ryu

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引用次数: 0

摘要

过渡金属基层状双氢氧化物（LDH）晶体作为高效氧进化反应（OER）催化剂，因其数量多、成本低、环境友好以及对间歇性反应物的吸附/解吸能量有利而引起了人们的极大兴趣。然而，LDH 晶体作为高性能电催化剂的应用常常受到其固有的低电导率导致的电子传输动力学迟缓的阻碍。在此，我们报告了在过渡金属 LDH 晶体中加入金属元素对其电催化活性的影响。在这项研究中，我们采用简便的溶热法在三维多孔泡沫镍上生长了碲（Te）掺杂镍铁（xTe-NiFe）的 LDH 微晶，其中 x = 0.2、0.4、0.6 和 0.8。利用线性扫频伏安法和电化学阻抗谱分析了其电催化 OER 特性。研究发现，Te 的含量对提高镍铁合金 LDH 的催化活性起着至关重要的作用。研究了引入 NiFe LDH 的 Te (x) 的最佳量对 OER 性能的影响。

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Oxygen evolution reaction of tellurium-incorporated nickel-iron layered double hydroxide microcrystals

Transition-metal-based layered double hydroxide (LDH) crystals have generated substantial interest as highly efficient oxygen evolution reaction (OER) catalysts because of their abundance, low cost, environmental friendliness, and favourable adsorption/desorption energies for intermittent reactants. However, the application of LDH crystals as high-performance electrocatalysts is frequently hindered by their sluggish electronic transport kinetics resulting from their intrinsically low conductivity. Herein, we report the effects of incorporating metalloids into transition metal LDH crystals on their electrocatalytic activity. In this study, tellurium (Te) incorporated NiFe (xTe-NiFe) LDH microcrystal, where x = 0.2, 0.4, 0.6 and 0.8, were grown on three-dimensional porous nickel foam using a facile solvothermal method. The electrocatalytic OER properties were analyzed using linear sweep voltammetry and electrochemical impedance spectroscopy. The amount of Te was found to play a crucial role in improving the catalytic activity of NiFe LDH. The optimum amount of Te (x) introduced into NiFe LDH was examined with respect to the OER performance.

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来源期刊

Journal of Crystal Growth 化学-晶体学

CiteScore

3.60

自引率

11.10%

发文量

373

审稿时长

65 days

期刊介绍： The journal offers a common reference and publication source for workers engaged in research on the experimental and theoretical aspects of crystal growth and its applications, e.g. in devices. Experimental and theoretical contributions are published in the following fields: theory of nucleation and growth, molecular kinetics and transport phenomena, crystallization in viscous media such as polymers and glasses; crystal growth of metals, minerals, semiconductors, superconductors, magnetics, inorganic, organic and biological substances in bulk or as thin films; molecular beam epitaxy, chemical vapor deposition, growth of III-V and II-VI and other semiconductors; characterization of single crystals by physical and chemical methods; apparatus, instrumentation and techniques for crystal growth, and purification methods; multilayer heterostructures and their characterisation with an emphasis on crystal growth and epitaxial aspects of electronic materials. A special feature of the journal is the periodic inclusion of proceedings of symposia and conferences on relevant aspects of crystal growth.