PdCl_4^（2－）接着PVP修饰电极的催化动力学研究

Study on the Catalytic Kinetics of Protonated PVP Coated Electrode with Electrostatically Bound PdCl_4￣(2-)

用循环伏安法考察了ＰｄＣｌ４２－接着ＰＶＰ修饰电极的电化学性质，表明其在酸性溶液中对Ｆｅ２＋的氧化具有良好的催化作用。用旋转圆盘电极法、极化曲线法等研究了电极对Ｆｅ２＋氧化催化过程的控制步骤及有关的动力学参数。

The electrochemical behavior of electrode coated with PVP(Polyvinyl-pyridine) film electrostatically bound PdCI42-was studied by means of cyclic voltammetry. The results showed that the electrode had good electrocatalytic activity on the oxidation of Fe2+ to Fe3+ in acidic aqueous solution. The rate-controlling step and kinetic parameters of the catalytic reaction were determined by the use of rotating disk electrode. The corresponding rate constants of the catalytic reaction were evaluted. The modified electrode gave very stable response for the oxidation of Fe2+ to Fe3+. The present investigation showed the possibility of using the electrode for electrocatalysis.