采用电化学方法制备了负载Pt的活性炭纤维 ,为研究其微孔结构、Pt的分散性以及对NO的吸附活性 ,分别考察了其对氮气、水和NO的吸附 .电沉积Pt活性炭纤维的氮吸附等温线仍呈Langmuir型 ,表面积和微孔孔径基本不变 ;对水的初始吸附点数远远大于活性炭纤维 .这表明电沉积Pt没有改变活性炭纤维的微孔结构 ,Pt粒高度分散在活性炭纤维的外表面 .而NO的吸附量显著增加 ,说明存在化学吸附 The Pt-loaded activated carbon fibers were prepared by electrochemical method, and their adsorption on nitrogen, water and NO were investigated in order to study their microporous structure, Pt dispersibility and NO adsorption activity, respectively. The adsorption isotherms were still Langmuir type, the surface area and pore diameter basically unchanged; the initial adsorption point of water was much larger than that of activated carbon fiber.This shows that Pt electrodeposition did not change the pore structure of activated carbon fiber, Pt particles highly dispersed in activated carbon fiber Of the external surface, while the NO adsorption increased significantly, indicating the existence of chemical adsorption