ELECTROCHEMICAL NO2 GAS SENSORS - MODEL AND MECHANISM FOR THE ELECTROREDUCTION OF NO2

被引：57

作者：

CHANG, SC ^{[1
]}

STETTER, JR ^{[1
]}

机构：

[1] TRANSDUCER RES INC,1228 OLYMPUS DR,NAPERVILLE,IL 60540

来源：

ELECTROANALYSIS | 1990年 / 2卷 / 05期

关键词：

D O I：

10.1002/elan.1140020506

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Two types of sensing devices have been studied in order to elucidate the mechanism of response of amperometric gas sensors. A high‐surface‐area electrode (HSAE) sensor produces fast electrode reactions, and the steady‐state sensor signals are controlled either by permeation or by the supply of analyte to the sensor. For low‐surface‐area electrode (LSAE) sensors, a kinetically controlled signal is observed. A mechanism that involves a “chemically” induced changes in the gold electrode surface oxide coverage is proposed, and the activation energy for NO2 reduction at a gold electrocatalyst is calculated. A general model of sensor response is proposed that can describe the behavior of the steady‐state response for both HSAE and LSAE sensors. Copyright © 1990 VCH Publishers, Inc.

引用

页码：359 / 365

页数：7

共 20 条

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