Synthesis and electrochemical properties of a nickel(II) thiacalix[4]arene-based electrocatalyst for the hydrogen evolution reaction

H. El Moll, Khalaf M. Alenezi, Ashanul Haque, J. Humaidi, Raoudha Soury, E. Azzam, Fahad Abdulaziz, Salman Latif, M. Vraneš
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引用次数: 2

Abstract

Thiacalix[4]arene with four sulfur-bridging atoms and four hydroxy coordinating groups in the lower rim is a promising candidate for powerful electrocatalytic hydrogen production. However, there are only a few examples reported in the literature where conjugated thiacalix[4]arene is used as a pre-catalyst for the hydrogen evolution reaction. The present work evaluates the electrocatalytic performance of a nickel(II) coordination complex based on generic thiacalix[4]arene. The coordination complex is characterized by cyclic voltammetry, where two reduction peaks are observed at −0.57 and −1.33 V for the two redox couples Ni2+/Ni+ and Ni+/Ni, respectively. The proton reduction occurs at the second peak potential with a slight shift at about −1.0 V, with increasing peak currents directly related to the number of acetic acid equivalents. The maximum peak current was observed to be at about 67 µA for 20 equiv. of acetic acid.
镍(II)噻吩[4]芳烃基析氢电催化剂的合成及电化学性能
具有4个硫桥原子和4个羟基配位基团的硫环[4]芳烃是一种很有前途的电催化制氢材料。然而,文献中仅报道了少数使用共轭噻吩[4]芳烃作为析氢反应预催化剂的例子。本研究评估了一种基于噻吩[4]芳烃的镍(II)配合物的电催化性能。通过循环伏安法对配合物进行了表征,发现Ni2+/Ni+和Ni+/Ni分别在−0.57 V和−1.33 V处有两个还原峰。质子还原发生在第二个峰电位,在−1.0 V左右有轻微的移动,峰值电流的增加与乙酸当量的数量直接相关。当乙酸浓度为20等量时,最大峰值电流约为67µA。
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来源期刊
Journal of Chemical Research-s
Journal of Chemical Research-s 化学科学, 有机化学, 有机合成
自引率
0.00%
发文量
0
审稿时长
1 months
期刊介绍: The Journal of Chemical Research is a peer reviewed journal that publishes full-length review and research papers in all branches of experimental chemistry. The journal fills a niche by also publishing short papers, a format which favours particular types of work, e.g. the scope of new reagents or methodology, and the elucidation of the structure of novel compounds. Though welcome, short papers should not result in fragmentation of publication, they should describe a completed piece of work. The Journal is not intended as a vehicle for preliminary publications. The work must meet all the normal criteria for acceptance as regards scientific standards. Papers that contain extensive biological results or material relating to other areas of science may be diverted to more appropriate specialist journals. Areas of coverage include: Organic Chemistry; Inorganic Chemistry; Materials Chemistry; Crystallography; Computational Chemistry.
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