电催化苯加氢Ag／Nafion电极制备研究

Preparation of Ag/Nafion Electrode for Electrocatlytic Hydrogenation of Benzene

采用浸清还原法制备Ag／Nafion电极，研究了Ag／Nafion电极的物理性质以及电催化笨加氢基本性能。用正交实验法确定了影响镀银效果的因素大小依次为：浸渍温度、浸渍条件、[Ag（NH3）2]^＋浓度、甲醛浓度、浸渍时间、还原温度、还原时间。确定最优化的Ag／Nafion电极制备条件为：Nation膜放于0．005mol／L的[Ag（NH3）2]^＋中，20℃超声波条件下浸渍0．5h，然后于1％的甲醛溶液中，20℃还原2h。

Preparation of Ag/Nafion electrodes by impregnation-reduction method has been studied. The factors of preparation of Ag/Nafion electrodes from chief to minor were： the temperature of impregnation, whether or not using ultrasonic, the concentration of [ Ag（NH3 ）2 ]^＋ , the concentration of formaldehyde, the time of impregnation, the temperature of reduction reaction, the time of reduction reaction. The optimal preparation parameters of Ag/Nafion electrodes were as follows： impregnation the Nafion membrane in 0. 005 mol/L [ Ag（NH3）2 ]^＋ solution for 30 minutes at 20 ℃ by ultrasonic treatment, then reduction for 2 hours at 20 ℃ in 1% formaldehyde solution.