网状Ni-Fe合金电催化剂的制备及析氧性能研究

Study on Preparation and Oxygen Evolution Performance of Net-Like Ni-Fe Alloy Electrocatalyst

采用电沉积的方法制备出了一种网状结构的Ni-Fe二元合金纳米电催化剂,研究了其表面调控机制和析氧反应性能.通过组分调控发现,Ni_(8)Fe_(2)具有极高的析氧反应活性;对Ni_(8)Fe_(2)的电化学活性进行了研究,当电流密度为10 mA/cm^(2)时,析氧反应的过电位为270 mV,塔菲尔斜率为77 mV/dec,电化学活性表面积高达11.13 cm^(2),表明其活性高;在1.52 V(vs.RHE)电压下,经过36000 s长时间运行依然很稳定,其电流密度还保持在12 mA/cm^(2),表明其稳定性好.

A nano-electrocatalyst of Ni-Fe binary alloy with reticular structure was prepared by electrodeposition method,and its surface regulation mechanism and oxygen evolution reaction performance were studied.It was found that Ni_(8)Fe_(2)had a high activity of oxygen evolution reaction by composition-based regulation.The electrochemical activity of Ni_(8)Fe_(2)was studied.When the current density of Ni_(8)Fe_(2)was 10 mA/cm^(2),the overpotential of oxygen evolution reaction was 270 mV,the Tafel Slope was 77 mV/dec,and the electrochemical active surface area was as high as 11.13 cm^(2),indicating high activity.At the voltage of 1.52 V(vs.RHE),the current density remains at 12 mA/cm^(2)after 36000 s CA test,which indicated ist great stability.