The electrolyte of electrochemical oxygen gas sensor

被引：0

作者：

Um, Jeong-Sik ^{[1
]}

Jang, Hyun-Jin ^{[1
]}

Kim, Seung-Mo ^{[1
]}

Min, Seok-Hong ^{[1
]}

机构：

[1] Kangnung Natl Univ, Dept Met & Mat Engn, Kangnung 210702, South Korea

来源：

ELECTRONIC MATERIALS LETTERS | 2007年 / 3卷 / 04期

关键词：

electrochemical oxygen gas sensor; electrolyte; acetic acid; potassium acetate;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Properties of electrolytes used to electrochemical(galvanic) oxygen gas sensor were examined to prolong the life time of sensor and to enhance the stability of sensor signal. Electrolytes were alkaline base such as potassium hydroxide and sodium hydroxide, and acidic base such as propionic acid and acetic acid. Properties of electrolytes examined were conductivity, pH, and solubility of PbO. Acetic acid shows the highest solubility of PbO and can be used to prolong the life time of electrochemical oxygen gas sensor, but it shows so low pH that H-2 may be produced at the cathode and also has too low conductivity to be used as an electrolyte. The mixing of potassium acetate into acetic acid increases pH and conductivity without decreasing the solubility of PbO. Also, the addition of gelling agent such as silica improves the stability of sensor signal against temperature and vibration.

引用

页码：211 / 216

页数：6