用电位扫描法和旋转电极法等研究了同液和异液ＵＰＤ法制备的Ｐｔ／Ｓｂａｄ电极对某些Ｃ２－醇、醛和羧酸的催化氧化作用，证明该电极对醛基的氧化有显著的催化活性，对羟基氧化的活性很小，对羧基氧化没有活性．跟异液ＵＰＤ法所制Ｐｔ／Ｓｂａｄ电极相比，同液ＵＰＤ法所制电极的活性较小．讨论了Ｐｔ／Ｓｂａｄ电极催化氧化作用的局限性，认为它只能对低电位范围内受毒物抑制的电极反应产生催化效应．通过实验确定了Ｃ２－醛类催化氧化反应的决定速度步骤是醛分子在电极表面的转化步骤，而氧化产物则是草酸，据此提出了相应的反应机理 The potential oxidation of some C2-alcohols, aldehydes and carboxylic acids by Pt / Sbad electrode prepared by UPD method by potentiodynamic and rotational electrode methods was studied. It was found that the oxidation of aldehyde groups Significant catalytic activity, the activity of the hydroxyl oxidation is very small, no activity of carboxyl oxidation. Compared with the Pt / Sbad electrode produced by the UPD method, the activity of the electrode prepared by the same liquid UPD method is less. The limitation of catalytic oxidation of Pt / Sbad electrode was discussed. It was considered that it could only catalyze the electrode reaction of poisoning inhibited in the low potential range. The decisive speed of the C2-aldehydes catalytic oxidation reaction was confirmed by experiments. The conversion step of the aldehyde molecules on the electrode surface, and the oxidation product was oxalic acid, accordingly proposed the corresponding reaction mechanism