【摘要】 在自制石墨—环氧树脂固态电极上,于不完全的单体氧化电位下,以循环伏安法制备邻苯二胺超薄膜(UT—PPD),得到两对可逆氧化还原峰,分别归属于两种结构的电聚合产物.实验研究了碘离子在该膜中的电化学行为,得到掺杂反应的一级反应速率常数0.062 s-1和离子缔合常数7.11.该UT—PPD膜对碘离子氧化反应具有很高的催化能力,单位吸附量的聚合膜产生的催化效率为普通PPD膜的8.8倍.更多还原

【Abstract】 The poly ortho-phenylenediamine ultrathin（UT-PPD） film modified electrode was prepared on graphite-epoxy solid electrode by cyclic voltammetry under oxidation potential.The UT-PPD film shows two pairs of reversible redox peaks,corresponding to the two molecular structures.Iodine ion at the modified electrode shows an irreversible oxidation,which can be used to monitor the doping/dedoping behavior of iodine ion.The doping reaction follows a first order reaction with a rate constant of 0.062 s^-1 and an equilibrium constant of 7.11.The UT-PPD film shows an enriching catalytic activities for iodine with a catalytic efficiency 8.8 times higher than that of general PPD film.更多还原