【摘要】 主要研究了金属元素Cr对钒基复合析氢阴极V₃TiNi_0.56Cr_x（x=0, 0.2, 0.4, 0.6）/NiMoW合金物相、形貌、电催化性能与耐腐蚀性能的影响。结果表明：随着合金基体材料中Cr含量增加，基体合金表面形成了钝化膜，能够使基体材料在电化学腐蚀的过程中产生钝化区。钒基复合析氢阴极的电催化能力略有下降，由极化曲线外推法计算得到自腐蚀电流减小3.61 mA/cm、自腐蚀电位正移0.154 V。长时间电解后，钒基复合析氢阴极表面形成的缝隙减少，电流密度变化幅度减小，说明掺杂金属元素Cr后，其耐蚀性能与长效稳定性均有所提高。更多还原

【Abstract】 This article mainly studied the influence of Cr element on the electrocatalytic performance and corrosion resistance of vanadium-based V₃TiNi_0.56Cr_x（x=0,0.2,0.4,0.6）/NiMoW composite cathode for hydrogen evolution. The phase, morphology, electrocatalytic performance, and corrosion resistance of V₃TiNi_0.56Cr_x（x=0,0.2,0.4,0.6）/NiMoW alloy during the electrocatalytic process is analyzed. A passivation film is formed on the surface of the matrix alloy, which can create a passivation zone in the electrochemical corrosion process of the matrix material. It is considered to contain Ni and Cr interstitial substituents. The electrocatalytic ability of vanadium-based composite cathode for hydrogen evolution slightly decreases. The self-corrosion current decreases by 3.61 mA/cm and the self-corrosion potential shifts forward by 0.154 V, which is calculated by the polarization curve extrapolation method. After long-term electrolysis, the amount of gaps formed on its surface decrease, and only slight changes existed in the amplitude of current density change, indicating that its corrosion resistance and long-term stability have been improved.更多还原