Temperature-Dependent NO2 Sensing Mechanisms over Indium Oxide

被引：73
|
作者：
Roso, Sergio [1 ,2 ]
Degler, David [3 ]
Llobet, Eduard [1 ]
Barsan, Nicolae [3 ]
Urakawa, Atsushi [2 ]
机构：
[1] Univ Rovira & Virgili, Minos Emas, Av Paisos Catalans 26, E-43007 Tarragona, Spain
[2] Barcelona Inst Sci & Technol, Inst Chem Res Catalonia ICIQ, Av Paisos Catalans 16, Tarragona 43007, Spain
[3] Univ Tubingen, IPTC, Morgenstelle 15, D-72076 Tubingen, Germany
来源：
ACS SENSORS | 2017年 / 2卷 / 09期
关键词：
gas sensor; In2O3; NO2; DRIFTS; multivariate analysis; MULTIVARIATE CURVE RESOLUTION; MCR-ALS; IN2O3; SENSORS; TOOL;
D O I：
10.1021/acssensors.7b00504
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The surface species responsible for NO2 gas sensing over indium oxide was studied by operando DRIFTS coupled to a multivariate spectral analysis. It revealed the important roles of surface nitrites on the temperature dependent gas sensing mechanism and the interaction of such nitrites with surface hydroxyls. A highly hydroxylated surface with high concentration of surface adsorbed H2O is beneficial to enhance the concentration of adsorbed NO2, present as nitrites, thus explaining superior sensing response at lower operating temperatures.
引用
收藏
页码：1272 / 1277
页数：6
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