Cu/MoS_2的熔盐电解法制备及其在碱性条件下析氢反应性能的提高

Two kinds of Cu/MoS₂ with different nanostructures were prepared by molten salt electrolysis method and doped with transition metal Cu. The working electrode was prepared by the coating method. Its structure and properties were verified by X-ray diffraction (XRD), transmission electron microscope (TEM), energy dispersive X-ray spectroscopy (EDS), scanning electron microscope (SEM), selected area electron diffraction (SAED) and various electrochemical means. The results show that the nanosheet Cu/MoS₂ exhibits excellent hydrogen evolution catalytic performance in an alkaline solution (1 mol·L⁻¹ KOH): the overpotential is 199.6 mV at a current density of 10 mA·cm⁻², the Tafel slope is 59 mV·dec⁻¹, the double-layer capacitance is 26.1 mF·cm⁻², the equivalent charge transfer resistance is 12.4 Ω, and it has relatively good electrochemical durability and stability.

通过熔盐电解法并掺杂过渡金属Cu制备2种不同纳米结构的Cu/MoS_2。采用涂敷法制备工作电极,通过X射线衍射(XRD)、透射电子显微镜(TEM)、能量散射X射线谱(EDS)、扫描电子显微镜(SEM)、选区电子衍射(SAED)以及各种电化学手段验证了其结构和性能。结果表明,纳米片状Cu/MoS_2在碱性溶液(1 mol·L~(-1) KOH)中表现出优异的析氢催化性能:在电流密度为10 mA·cm~(-2)时过电位为199.6 mV,Tafel斜率为59 mV·dec~(-1),双电层电容为26.1 mF·cm~(-2),等效电荷转移电阻为12.4 Ω,具有较为良好的电化学耐久性和稳定性。