将新型气体薄层电极技术应用于气体扩散膜疏水孔体积及孔率的测定 .采用循环伏安法 ,对位于疏水孔内的氧气进行耗尽式电化学还原反应 ,其所消耗的电量用于对膜疏水孔体积及孔率的测定 .对自催化膜和非催化膜检测结果的分析表明 ,本方法与称重法结果一致 ,但检测更加方便且无破坏性 .同时对长期浸泡于碱性溶液中的气体扩散膜的疏水性能 ,以及孔率的温度系数进行了测定 The new gas thin-film electrode technology was applied to the determination of pore volume and porosity of hydrophobic diffusion pores in gas diffusion membrane.Using cyclic voltammetry, depletion-type electrochemical reduction of oxygen in hydrophobic pores was used to Determination of membrane hydrophobic pore volume and pore volume.Analysis of the autocatalytic membrane and non-catalytic membrane test results showed that the method is consistent with the results of the weighing method, but the detection is more convenient and non-destructive.At the same time, The hydrophobic properties of the gas diffusion membrane in the solution and the temperature coefficient of porosity were measured