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对短时间内Ｐｔ－ＳＰＥ气敏电极上ＣＯ氧化电流的衰退现象的研究表明，Ｐｔ表面无ＣＯ吸附态情况下，衰退主要与电极阳极极化后Ｐｔ表面氧化程度加深有关；采用动电势扫描法可使电极对ＣＯ氧化的催化活性基本恢复，但随着电极的进一步极化，衰退仍会继续．
The research on the decay phenomenon of CO oxidation current on Pt-SPE gas sensor in a short period of time indicated that the degradation of Pt surface was mainly related to the oxidation of Pt surface after anodic polarization. The catalytic activity of the electrode for the CO oxidation can be basically restored, but as the electrode further polarization, the recession will continue.