摘要
借助循环伏安和计时电流方法,研究了金属电极材料对YSZ氧传感器性能的影响。结果表明,在500℃和空气条件下,Ag-1%Pd/YSZ电极由于具有合适的微观结构以及较强的氧扩散能力,使其无论是作为YSZ氧传感器的阳极还是阴极,性能均为最好,而Au/YSZ电极最差;各金属/YSZ电极具有相似的阳极极化计时电流曲线,其电流密度值在10 s之内即可达到平稳;随着阳极阶跃极化电位增大,使得参加电极还原反应的氧原子数量增加,从而导致Ag-1%Pd/YSZ电极电流密度稳定值亦增大。
By means of cyclic voltammetry and chronoamperometry methods, the effects of metal electrode materials on the characteristics of YSZ oxygen sensor were studied. This paper indicates that with a controlled temperature of 500℃ and regular air condition, owing to its proper microstructure and rather strong oxygen diffusibility, the Ag - 1% Pd/YSZ electrode has the best per- formance not only as the anodic electrode but also as the cathodic electrode of the YSZ oxygen sensor, whereas surprisingly the Au/ YSZ electrode presented the poorest activity used as the YSZ oxygen sensor electrode. The current density of the metal/YSZ elec- trode has similar variation tendency after its polarization with different anodic potentials, which can reach the stationary state just in the first ten seconds. As the polarization potential is steadily increased, the oxygen atoms participate in the electrode reduction reac- tions are also increased, so lead to the increase of the Ag - 1% Pd/YSZ electrode current density.
出处
《仪表技术与传感器》
CSCD
北大核心
2012年第1期1-3,共3页
Instrument Technique and Sensor
基金
国家863计划项目(2006AA09Z205)
国家基金委面上项目(40573046)
中国科学院重大科研装备研制项目(YZ200720)
关键词
电极材料
YSZ
氧传感器
循环伏安
计时电流
电流密度
electrode material
YSZ
oxygen sensor
cyclic voltammetry
chronoamperometry
current density
