聚吡咯膜电极对茜素红的电催化作用

用循环伏安法研究了电化学聚合的聚吡咯（ＰＰｙ）膜电极对茜素红电极反应的电催化活性。在聚吡咯膜电极上，茜素红的阳极氧化电流比在铂电极上增加数倍。相应的阴极过程也较铂电极显出一定的催化活性。茜素红在铂电极上和ＰＰｙ膜电极上都显示了吸附现象。在ＰＰｙ膜电极上用电位扫描法载入一定的铂微粒时，载铂微粒的ＰＰｙ膜电极上茜素红的电催化电流进一步增加．在较高的电位和扫描速率下更为明显；但载入的铂微粒过多时，则使电流峰变平坦。

ELECTROCATALYTIC EFFECT OF POLYPYRROLE FILM ELECTRODE ON ALIZARIN RED

The catalytic activity of the electrochemical reaction of alizarin red on the polypyrrole(PPy)filmelectrodes synthesized by means of electropolymerization had been studied by cyclic voltammetry. Anod-ic oxidation current of alizarin red increases several times on the PPy film electrode than that on theplatinum electrode.It shows that the catalytic activity on PPy electoode is somewhat more than on plat-inum electrede in the corresponding cathodic process.Meanwhile,alizarin red shows adsorption phe-nomena both on the platinum electred e and PPy film el ectrode. By using a potential sweep methed andloading some platinum microparticles the on PPy film electrode,We obeerved the that electrocatalyticcurrent of alizarin red on the PPy film electrode with platinum microparticles continuously increase,even more obvious under the conditions of higher potential and scanning rate. Hopwever,loading moreplatinum microparticles than enough will flatten the current peak.