The ever-increasing requirement of an electrochemical sensor in various paramedical and industrial applications, the recent research is motivated to fabricate a new type of electrode material with unique electrochemical properties for quantitative detection of various target analytes. Recently, the metal diselenides have been interested in a broad range of electrochemical applications due to their interesting electrocatalytic performances. Despite the metal diselenides have been widely focused on hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR), it is not much focused on electrochemical sensor. For the first time, the bimetallic cobalt-iron diselenide nanosphere entrapped functionalized carbon nanofiber (CoFeSe2/f-CNF) composite have been synthesized by using simple hydrothermal synthesis and used as an electrode material for efficient electrochemical detection of caffeic acid (CA). The functionalization of CNF and the formation of CoFeSe2/f-CNF nanocomposite have been successfully scrutinized by using Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray powder diffraction, transmission electron microscopy and scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. In addition, the electrochemical properties of CoFeSe2/f-CNF modified glassy carbon electrode (GCE) towards CA sensing were investigated by using cyclic voltammetry, differential pulse voltammetry and electrochemical impedance spectroscopy. As the result of the electrochemical studies, the developed CoFeSe2/f-CNF/GCE sensor exhibits very low detection limit (0.002 μM) and better sensitivity (2.04 μA μM-1 cm-2) of CA. And also, CoFeSe2/f-CNF/GCE sensor shows the feasible detection of CA in red wine samples, it reveals the excellent practicability of CoFeSe2/f-CNF/GCE.

中文翻译：

---

双金属CoFeSe 2 纳米球包裹在功能化碳纳米纤维中，用于葡萄酒样品中咖啡酸的选择性和灵敏电化学检测

在各种辅助医疗和工业应用中对电化学传感器的需求不断增加，最近的研究促使人们制造一种具有独特电化学性能的新型电极材料，用于各种目标分析物的定量检测。最近，金属二硒化物由于其有趣的电催化性能而在广泛的电化学应用中受到关注。尽管金属二硒化物已被广泛关注于析氢反应（HER）和氧还原反应（ORR），但它并没有太多关注电化学传感器。首次，双金属钴铁二硒化物纳米球包裹的功能化碳纳米纤维（CoFeSe2/f-CNF）复合材料已通过简单的水热合成法合成，并用作有效电化学检测咖啡酸（CA）的电极材料。通过使用傅里叶变换红外光谱、拉曼光谱、X 射线粉末衍射、透射电子显微镜和扫描电子显微镜、能量色散 X 射线光谱，已经成功地详细研究了 CNF 的功能化和 CoFeSe2/f-CNF 纳米复合材料的形成。 X 射线光电子能谱。此外，通过使用循环伏安法研究了 CoFeSe2/f-CNF 修饰的玻碳电极（GCE）对 CA 传感的电化学性能，差分脉冲伏安法和电化学阻抗谱。作为电化学研究的结果，开发的 CoFeSe2/f-CNF/GCE 传感器表现出非常低的 CA 检测限 (0.002 μM) 和更好的灵敏度 (2.04 μA μM-1 cm-2)。并且，CoFeSe2/f-CNF/GCE 传感器显示了对红葡萄酒样品中 CA 的可行检测，揭示了 CoFeSe2/f-CNF/GCE 优异的实用性。