Au-MmNi_(3.2)Al_(0.2)Mn_(0.6)Co_(1.00)电极对NaBH_4电催化氧化

Electrocatalytic Activities of Au-MmNi_(3.2)Al_(0.2)Mn_(0.6)Co_(1.00) for Borohydride Oxidation

研究经NaOH处理了的MmNi3.2Al0.2Mn0.6Co1.0,再应用电沉积法制备Au改性的MmNi3.2Al0.2Mn0.6Co1.0催化剂对NaBH4的电催化氧化性能.SEM观察催化剂样品的微观形貌,线性伏安扫描法测定其电催化氧化性能,发现Au-MmNi3.2Al0.2Mn0.6Co1.0电极电催化氧化NaBH4电流密度为60 mA.cm-2,比在MmNi3.2Al0.2Mn0.6Co1.0电极的增加3.5倍.若对该电极在电解质中预浸泡10 h,则氧化电流密度可达到184 mA.cm-2.

In this work, the electrocatalytic activities of MmNi3.2Al0.2Mn0.6Co1.0, NaOH treated MmNi3.2Al0.2 Mn0.6Co1.0 and Au-MmNi3.2Al0.2Mn0.6Co1.0 obtained after NaOH treatment （Mm： misch metal） for NaBH4 oxidation were reported. The electrodes were prepared by electrodeposition, their morphologies were analysized by SEM, their electrocatalyfic properties were studied by the linear sweeping test. It was found that the oxidation current density of the Au-MmNi3.2Al0.2Mn0.6C01.0 was 60 mA · cm^-2, it was 3.5 times higher than that at the MmNi3.2Al0.2Mn0.6Co1.0 electrode. In addition, the oxidation current density at the Au-MmNi3.2Al0.2Mn0.6Co1.0 electrode immersed in the electrolyte solution for 10 hours was 184 mA· cm^-2.