Sensing behavior of mixed potential NO2 sensors equipped with LaMO3 (M = Fe or Cr) sensing electrodes

被引：15
作者：
Sun, Xia [1 ]
Zhang, Cheng [1 ]
Feng, Tao [2 ]
Jiang, Danyu [2 ]
机构：
[1] Shanghai Inst Technol, Shanghai 200235, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China
来源：
IONICS | 2015年 / 21卷 / 06期
关键词：
NO2; sensor; Perovskite-type oxide; LaFeO3; LaCrO3; Catalytic activity; STABILIZED-ZIRCONIA; HIGH-TEMPERATURE; SOLID-ELECTROLYTE; OXIDE ELECTRODE; YSZ; NIO; SENSITIVITY;
D O I：
10.1007/s11581-014-1338-2
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this paper, yttria-stabilized zirconia (YSZ) electrochemical sensors equipped with a perovskite-type oxide (either LaFeO3 or LaCrO3) sensing electrode (SE) were fabricated and examined in terms of their NO2 sensing properties at high temperatures. A linear correlation was obtained for these devices between the electromotive force (EMF), and the logarithm of the NO2 concentration from 30 to 500 ppm in the temperature range 500-600 A degrees C. The LaFeO3 device proved more sensitive for all temperatures. The variation of the EMF as a function of the O-2 concentration at a given NO2 concentration revealed that LaFeO3 has a better catalytic activity to O-2 than LaCrO3, leading to larger EMFs.
引用
收藏
页码：1725 / 1730
页数：6
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