铂催化剂在有机电解液中对氨氧化的电催化性能

摘要

The electrocatalytic performance of the carbon supported Pt(Pt/C) catalyst electrode for the NH3 oxidation in the current type of the electrochemical NH3 sensor with the organic electrolyte was investigated. It was found that in the mixed electrolyte of propylene carbonate(PC) and 1,2dimethoxyethane(DME) with low viscosity, Pt/C catalyst electrode has good electrocatalytic activity and stability as well as good selectivity and short response time for the NH3 oxidation. In addition,the sensor is resistant to the high temperature and low relative humidity. Thus, PC/DME mixed organic electrolyte can be used as the electrolyte in the current type of the electrochemical NH3 sensor.It can solve the invalidation problem of water electrolyte due to the water evaporation and prolong sensor lifetime.%研究了用碳酸丙烯酯(PC)和低粘度的乙二醇二甲醚(DME)作电流型电化学氨气传感器的有机混合电解液时,氨在碳载Pt(Pt/C)催化剂电极上的电氧化性能.实验表明,Pt/C催化剂电极对氨的氧化有很好的电催化活性,稳定性、选择性和响应时间等参数均良好,而且还能耐高温低湿的条件,可解决水溶液电解液因蒸发而失效的问题,延长了传感器的寿命.