摘要
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25g/L CoSO4.7H2O、电流密度30mA/cm2、镀液温度30℃、时间60min。Ni-S-Co镀层具有非晶态结构,比Ni-S镀层具有更大的表面积和更好的析氢催化活性,电极析氢电位随着电解液温度的升高而降低,电极的析氢活化能为27.24kJ/moL。
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 CoSO4·7HeO, current density, temperature of electroplating solution and electro-deposition 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 hy drogen evolution activation energy is 27.24 kJ/mol.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2011年第6期74-77,共4页
Surface Technology
关键词
Ni—S—Co电极
电沉积
析氢
Ni-S Co electrode
electrodeposition
hydrogen evolution
