【摘要】 在-0.8～-1.2V（vs.SCE）的电位范围内,通过不同时间的电沉积,制备了FeCoNi层状氢氧化物。在-1.0V下沉积600s得到的FeCo₅Ni₁₃,均匀分布在泡沫镍（NF）基体表面,呈层状结构。FeCo₅Ni₁₃的层厚约30nm,彼此交织形成蜂窝状,不仅提供了高的比表面积,还增强了FeCo₅Ni₁₃与基底之间的结合。FeCo₅Ni₁₃作为析氧反应的催化剂时,最低初始电位仅为1.48V（vs.RHE）,最小的过电位为100mA/cm²时的310mV,以及最低的Tafel斜率,仅为39mV/dec,表现出最佳的催化性能。在10mA/cm²条件下电解120h后,FeCo₅Ni₁₃仍保持蜂窝结构并且催化性能几乎没有退化。因此,电沉积FeCo₅Ni₁₃层状氢氧化物在碱性水电解析氧反应中具有良好的应用前景。更多还原

【Abstract】 FeCoNi layered hydroxides were prepared via electrodeposition at the potential range from-0.8Vto-1.2Vfor various deposition times.FeCo₅Ni₁₃ were obtained at-1.0Vfor 600s,which uniformly distributed on the surface of NF matrix and presented a layered structure.The layers of FeCo₅Ni₁₃ were about 30nm thick and interwoven with each other to form a honeycomb shape,which not only provided a high specific surface area,but also strengthen the connection between the FeCo₅Ni₁₃and the substrate.When used as the catalysts of oxygen evolution reaction,FeCo₅Ni₁₃LH had the lowest initial potential of 1.48 V（vs.RHE）,and the smallest overpotentials of310mV,respectively at 100 mA/cm²,as well as the lowest Tafel slope,only 39 mV/dec,indicating the optimal catalytic performance.After long-term electrolysis at 10 mA/cm² for 120 h,FeCo₅Ni₁₃LH still maintained the honeycomb structure and nearly the same catalytic performances.Therefore,electrodeposition of FeCo₅Ni₁₃layered hydroxides implied a good application prospect in oxygen evolution reaction in alkaline water electrolysis.更多还原