镍硫钴析氢电极的制备及性能研究

采用电沉积方法制备Ni-S-Co合金电极,通过正交实验和极化曲线测试研究了CoSO4·7H2O浓度、电流密度、电镀液温度、电沉积时间和电解液温度对Ni-S-Co电极析氢性能的影响.采用SEM,XRD和EDXA对镀层的形貌、结构和组成进行观察和分析.实验结果表明:制备具有最佳析氢活性的Ni-S-Co电极的工艺条件是25 ...

Study on the Preparation and Hydrogen Evolution Performance of Ni-S-Co Electrode

Ni-S-Co alloy electrodes were prepared by electrodeposition.The effects of CoSO4·7H2O content,current density,temperature of electroplating solution and electrodeposition time as well as temperature of electrolyte on the hydrogen evolution performance of Ni-S-Co alloy electrodes were studied using orthogonal experiment and polarization curves measurement.The morphology,structure and composition of Ni-S-Co alloy electrodes were also investigated by SEM,XRD and EDXA.The results show that the optimized hydrogen evolution activity of Ni-S-Co alloy electrodes is obtained when the concentration of CoSO4·7H2O,current density,temperature of electroplating solution and electrodeposition time are 25 g/L,30 mA/cm2,30 ℃,and 60 min,respectively.Ni-S-Co coating with amorphous structure has much greater surface and higher catalytic activity of hydrogen evolution compared with the Ni-S coating.In addition,the hydrogen evolution potential of Ni-S-Co electrode decreases when the temperature of electrolyte increases,and its hydrogen evolution activation energy is 27.24 kJ/mol.