摘要
研究了氨在用含LiClO4的二甲基甲酰胺(DMF)作电解质中的氧化。结果发现,在这种电解液中,当氨气在玻碳电极上发生电化学氧化时,DMF也开始氧化而干扰了氨气的检测。但当在DMF中加入离子液体,四氟硼酸1-丁基-3-甲基-咪唑([bmim]BF4)后,DMF的电氧化受到抑止,而氨气的氧化峰峰电位从1.15 V负移至0.90 V,从而使DMF不干扰氨气的检测。研究结果为开发控制电位电化学氨气传感器新型电解液提供了新的思路。
The oxidation of NH3 in DMF with LiClO4 as the electrolyte was investigated. It was found for the first time that when NH3 is oxidized in this electrolyte, DMF is also oxidized in the similar potential range. This would interfere with the detection of NH3. However, if an ionic liquid, [ bmim ] BF4, is added into DMF, the oxidation of DMF would be inhibited and the oxidation peak of NH3 would shift negatively from 1.15 V to 0.90 V, suppressing the interference by DMF to the detection of NH3. This result suggests a new idea for developing a new electrolyte for potential-fixed electrochemical NH3 sensors.
出处
《应用化学》
CAS
CSCD
北大核心
2008年第11期1372-1374,共3页
Chinese Journal of Applied Chemistry
基金
华瑞科学仪器(上海)有限公司资助项目
