【摘要】 本文在氯化胆碱（ChCl）-乳酸（LA）体系下，研究在相同沉积量下不同金属镀层对析氢催化性能的影响，并通过扫描电子显微镜（SEM）进行微观形貌观察，X射线衍射仪（XRD）进行物相结构分析，阴极极化曲线测试（HER）、电化学极化测试（Tafel）以及交流阻抗测试（EIS）进行性能表征。结果表明：3种镀层晶形均为多边形结构，晶体由面心立方结构的单质Ni或Co组成，均择优于（220）晶面生长，且Ni-Co合金（200）晶面位置的特征峰总是位于纯镍和纯钴（200）晶面的特征峰之间。在相同沉积量下，3种镀层中Ni-Co镀层具有最低的析氢过电位178.9 mV，最小的析氢反应容抗弧半径，最低的腐蚀电流密度1.452×10^–6A/cm²以及最高的阻抗值2410Ω，析氢催化性能及耐蚀性能最优。更多还原

【Abstract】 In this paper, the effect of different metal coatings on thehydrogen evolution catalytic performance under the same deposition amount in the choline chloride（ChCl）-lactic acid（LA） system was studied. The microstructure was observed by scanning electron microscope（SEM）, the phase structure was analyzed by X-ray diffraction（XRD）, and the performance was characterized by cathodic polarization curve test（HER）, electrochemical polarization test（Tafel） and AC impedance test（EIS）.The results show that the crystal form of the three coatings is polygonal structure, and the crystal is composed of face centered cubic Ni or Co, which is better than（220） crystal face growth, and the characteristic peak of Ni-Co alloy（200） crystal face position is always between the characteristic peak of pure nickel and pure cobalt（200） crystal face. Under the same deposition amount, Ni-Co coating has the lowest hydrogen evolution overpotential of 178.9 mV, the smallest hydrogen evolution reaction capacitive reactance arc radius, the lowest corrosion current density of 1.452×10^–6 A/cm² and the highest impedance value of 2410 Ω, with the best hydrogen evolution catalytic performance and corrosion resistance.更多还原