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采用连续电位扫描法对含有Pd(Ⅱ)离子的溶液进行多次循环电位扫描,将钯沉积到金电极、多壁碳纳米管(WCNTs)-Nafion修饰的金电极上,制备了钯纳米、钯纳米-WCNTs修饰的金电极(Pd/Au、Pd-WCNTs/Au电极),利用循环伏安法、交流阻抗法对修饰电极的电化学特性进行了表征,利用差分脉冲法及计时电流法分别研究了Pd/Au电极、Pd-WCNTs/Au电极、Au电极及Pb电极对甲烷电氧化的催化活性,并研究了电极的稳定性和重现性,结果表明,Pd-WCNTs/Au电极对甲烷具有最高的电催化活性,重现性好、稳定性高。
The Pd (Ⅱ) ion-containing solution was subjected to cyclic potential scan by successive potentiometric scanning and palladium was deposited on gold electrode and WCNTs-Nafion modified gold electrode to prepare palladium nanoparticle, palladium The electrochemical properties of the modified electrode were characterized by cyclic voltammetry and AC impedance spectroscopy. The results of differential pulse and chronoamperometry The catalytic activity of Pd / Au electrode, Pd-WCNTs / Au electrode, Au electrode and Pb electrode for methane electrooxidation was studied. The stability and reproducibility of the electrode were also studied. The results showed that Pd-WCNTs / The highest electrocatalytic activity, reproducibility, and high stability.