采用直流电镀技术,通过改变电沉积电流密度制备了不同的非晶Ni-Fe-P涂层.采用稳态极化技术比较不同电流密度下电镀Ni-Fe-P合金涂层电化学催化析氢活性,发现电流密度200A/m~2电沉积的Ni-Fe-P合金涂层的电化学催化析氢性能最好.通过XRD分析镀层相结构,SEM观察涂层表面的微观结构及EDX分析表面成分,研究影响非晶Ni-Fe-P合金涂层的析氢电催化活性原因.结果表明,影响非晶Ni-Fe-P合金涂层电催化活性的主要因素是镀层中Fe、P元素含量.当Fe的含量最大18.63%(原子分数),P的含量最小13.14%(原子分数)时,非晶Ni-Fe-P涂层电催化析氢活性最好.
The different amorphous Ni-Fe-P coatings have been prepared with direct current plating technology through changing the current density.Catalytic activity of those electrodes prepared for hydrogen evolution reaction (HER) was compared with the steady-state polarization technique.Results indicated that Ni-Fe-P coating prepared at current density of 200A/m~2 shows much better catalytic activity.Surface morphology and elemental composition of the coatings were investigated by scanning electron microscopy (SEM) and energy dispersive X-ray diffraction microanalysis (EDX).Crystal structure of coatings was determined by X-ray diffraction (XRD) analysis.Studies showed P content of amorphous Ni-Fe-P coating was responsible for catalytic activity.The maximum catalytic activity of HER for the Ni-Fe-P coating could be obtained at Fe content of maximum 18.63% and P content of minimum 13.14 %.
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