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以电位扫描法把铂微粒沉积在聚苯胺（ＰＡｎ）薄膜电极上以制得铂微粒修饰的聚苯胺薄膜电极．该电极的催化活性以甲醛在０．５ｍｏｌ／Ｌ 硫酸溶液中的电化学氧化测定．它集催化活性和电活性于一体，对甲醛在酸性介质中的电化学氧化显示了非常高的电催化活性，较之裸铂电极、ＰＡｎ薄膜电极，其催化电流提高１０倍。铂微粒的大小、分布和载量，甲醛的浓度，基体金属的种类等因素对电极材料的催化活性均有影响。
Platinum particles were deposited on the polyaniline (PAn) thin film electrode by potentiometric scanning to prepare platinum particle modified polyaniline film electrode. The catalytic activity of the electrode was determined by electrochemical oxidation of formaldehyde in 0.5 mol / L sulfuric acid solution. It combines catalytic activity and electroactivity in the electrochemical oxidation of formaldehyde in acidic medium showed a very high electrocatalytic activity, compared with bare platinum electrode, PAn membrane electrode, the catalytic current increased by 10 times. The size, distribution and loading of platinum particles, the concentration of formaldehyde, the type of matrix metal and other factors have an impact on the catalytic activity of the electrode material.