An effective and simple strategy for fabricating a NiCo₂S₄/CNT nanocomposite by combining carbon nanotubes (CNTs) with tube-like NiCo₂S₄ is proposed, with the aim of producing a successful catalyst for the electrooxidation of methanol. Tube-like NiCo₂S₄ was successfully synthesized through a hydrothermal sulfurization process. The carbon nanotubes have high conductivity and provide conductive contact with the tube-like NiCo₂S₄, making the composite an excellent choice of electrode material for direct methanol fuel cells (DMFC). Field emission scanning electron microscopy (FESEM), field emission transmission electron microscopy (FETEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) were used to characterize and investigate the morphological and physicochemical properties of the nanocomposite. The results of these studies helped in evaluating the electrocatalytic behavior of the material and exploring its potential for use in DMFC. Electrocatalytic behavior towards methanol oxidation was studied by electrochemical methods (cyclic voltammetry (CV) and chronoamperometry (CA)), which show that the tube-like NiCo₂S₄/CNT nanocomposite exhibits excellent electrocatalytic performance for electrooxidation of methanol in an alkaline medium, with a high current density (~160 mA cm⁻²) and excellent stability (~83% retention after 500 CV cycles). The results presented here clearly indicate that the proposed tube-like NiCo₂S₄/CNT nanocomposite has potential for applications in DMFCs.

提出了一种通过将碳纳米管（CNTs）与管状NiCo ₂ S ₄结合而制备NiCo ₂ S ₄ / CNT纳米复合材料的有效而简单的策略，目的是生产一种成功的甲醇电氧化催化剂。通过水热硫化工艺成功合成了管状NiCo ₂ S ₄。碳纳米管具有高导电性并且提供与管状NiCo ₂ S _4的导电接触。，使该复合材料成为直接甲醇燃料电池（DMFC）电极材料的绝佳选择。场发射扫描电子显微镜（FESEM），场发射透射电子显微镜（FETEM），X射线光电子能谱（XPS）和X射线衍射（XRD）用来表征和研究纳米复合材料的形态和物理化学性质。这些研究的结果有助于评估该材料的电催化性能，并探索其在DMFC中的潜力。用电化学方法（循环伏安法（CV）和计时电流法（CA））研究了甲醇氧化的电催化行为，表明管形NiCo ₂ S ₄/ CNT纳米复合材料对甲醇在碱性介质中的电氧化表现出出色的电催化性能，具有高电流密度（〜160 mA cm ^-2）和出色的稳定性（在500 CV循环后保持〜83％的保留率）。此处给出的结果清楚地表明，提出的管状NiCo ₂ S ₄ / CNT纳米复合材料具有在DMFC中应用的潜力。