Effect of Cr2O3 electrode morphology on the nitric oxide response of a stabilized zirconia sensor

被引：67

作者：

Martin, LP ^{[1
]}

Pham, AQ ^{[1
]}

Glass, RS ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2003年 / 96卷 / 1-2期

关键词：

NOx; NO; gas sensor; microstructure; potentiometric; chromium oxide;

D O I：

10.1016/S0925-4005(03)00485-4

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Electrochemical sensors using a porous Cr2O3 Sensing electrode and an yttria- stabilized zirconia electrolyte were fabricated and tested for their NO sensitivity. The electrodes were fabricated by colloidal spray deposition of Cr2O3 powder, followed by sintering at 1000-1200 degreesC. The effects of sintering temperature on the electrode thickness and microstructure are discussed. The observed dependence of the NO sensitivity, in the temperature range of 500-600 degreesC, on both the electrode thickness and microstructure indicates competing mechanisms are involved in the sensor response. The reaction of NO and O-2 to form NO at the electrode surface was explored using a cherm luminescent NOx analyzer. The data indicate that sintering temperature also affects the catalytic activity of the Cr2O3. (C) 2003 Elsevier B.V. All rights reserved.

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页码：53 / 60

页数：8

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