Herein, we have demonstrated the synthesis of carboxylic functionalized multi-walled carbon nanotubes (f-MWCNTs) encapsulated Ni-doped Molybdenum diselenide 2D nanosheets (f-MWCNTs@NiMoSe₂) by cost-effective hydrothermal technique and served as a potential catalytic material in the dye-sensitized solar cells (DSSCs). The surface morphology and chemical information of the catalyst have been studied through the field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), and X-ray diffraction (XRD) techniques. Taking the electrochemical characterizations including cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), Tafel, and power conversion efficiency (PCE) measurements exhibited that f-MWCNTs@NiMoSe₂ delivered a better electrocatalytic behavior and outstanding chemical stability. The DSSCs fabricated with f-MWCNTs@NiMoSe₂ revealed the most impressive catalytic activity with remarkable PCE of 7.39% versus Pt-based standard electrode (PCE: 6.10%). These results indicate that the substitution of Ni and presence of MWCNTs significantly enrich the active sites and electrical conductivity of MoSe₂. Finally, the f-MWCNTs@NiMoSe₂ gives a new opportunity for promising commercial application in DSSCs.

在此，我们展示了通过具有成本效益的水热技术合成了羧基官能化多壁碳纳米管 (f-MWCNTs) 封装的 Ni 掺杂二硒化钼 2D 纳米片 (f-MWCNTs@NiMoSe ₂ )，并作为潜在的催化材料用于染料敏化太阳能电池（DSSC）。通过场发射扫描电子显微镜 (FESEM)、能量色散 X 射线光谱 (EDX)、透射电子显微镜 (TEM) 和 X 射线衍射 (XRD) 技术研究了催化剂的表面形貌和化学信息. 电化学表征包括循环伏安法 (CV)、电化学阻抗谱 (EIS)、Tafel 和功率转换效率 (PCE) 测量表明 f-MWCNTs@NiMoSe ₂提供了更好的电催化行为和出色的化学稳定性。用 f-MWCNTs@NiMoSe ₂制造的 DSSC显示出最令人印象深刻的催化活性，与 Pt 基标准电极（PCE：6.10%）相比，PCE 为 7.39%。这些结果表明Ni的取代和MWCNT的存在显着丰富了MoSe ₂的活性位点和电导率。最后，f-MWCNTs@NiMoSe ₂为DSSC 中的商业应用提供了新的机会。