Physico-chemical contribution of gold metallic particles to the action of oxygen on tin dioxide sensors

被引：75

作者：

Montmeat, P ^{[1
]}

Marchand, JC ^{[1
]}

Lalauze, R ^{[1
]}

Viricelle, JP ^{[1
]}

Tournier, G ^{[1
]}

Pijolat, C ^{[1
]}

机构：

[1] Ecole Natl Super Mines, CNRS, URA 2021, Ctr SPIN,LPMG, F-42023 St Etienne, France

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2003年 / 95卷 / 1-3期

关键词：

tin oxide; oxygen; metal; gold; electrical conductivity; space charge area;

D O I：

10.1016/S0925-4005(03)00410-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The role of a metal (gold) on the electrical response on tin oxide sensor was investigated thanks to the development of a particular test bench: it allows to separate the atmosphere surrounding SnO2 region in contact with gold electrode from the atmosphere in the area between electrodes. The action of oxygen and thus of a reducing gas such as CO was under focus and is greatly enhanced in the region containing gold. This result associated with calorimetric tests indicates the creation of specific oxygen species at the metal-oxide interface. A qualitative physico-chemical model based on the electronic effect of these adsorbed species, resulting in the increase of space charge area is proposed. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：83 / 89

页数：7

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