不同第二相IrO_2系析氧阳极的循环伏安行为

Cyclic Voltammetry Behaviour of IrO_2-type Anodes Doped with Different Second Phases for Oxygen Evolution

采用传统热分解法制备了不同第二相IrO2系氧化物析氧阳极涂层,使用循环伏安法(CV)研究了不同第二相元素Mn、Ni、Sn和Al对IrO2系氧化物析氧阳极在0.5mol/L H2SO4溶液中的循环伏安行为。结果表明,Ir-Mn氧化物析氧阳极外表面伏安电荷qo最大,Ir-Sn氧化物析氧阳极最低;Ir-Mn氧化物析氧阳极内表面伏安电荷qi也是最高,Ir-Al和Ir-Sn氧化物阳极相对较低;Ir-Mn氧化物析氧阳极总循环伏安电荷qT远高于其它涂层。

The oxide coatings of IrO2-type anode doped with different second phases for oxygen evolution were prepared by traditional method of thermal decomposition.Cyclic voltammetry(CV)was used to study the influence of doping different second phase elements(Mn,Ni,Sn and Al)on the cyclic voltammetry behaviors of IrO2-type oxide anodes for oxygen evolution in 0.5mol/L H2SO4 solution.The results showed that Ir-Mn oxide anode for oxygen evolution obtained the maximum of voltammetry charge qoon the outer surface of anode coating and Ir-Sn anode obtained the minimum.The Ir-Mn oxide anode for oxygen evolution also obtained the maximum of voltammetry charge qion the inner surface of anode coating.The voltammetry charge qiof Ir-Al and Ir-Sn was relatively low compared to that of Ir-Mn.The gross voltammetry charge qTof Ir-Mn oxide anode was far greater than that of other coatings.