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Temperature-Dependent NO2 Sensing Mechanisms over Indium Oxide
ACS Sensors ( IF 8.9 ) Pub Date : 2017-09-07 00:00:00 , DOI: 10.1021/acssensors.7b00504
Sergio Roso 1, 2 , David Degler 3 , Eduard Llobet 1 , Nicolae Barsan 3 , Atsushi Urakawa 2
Affiliation  

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.

中文翻译:

氧化铟上温度相关的NO 2传感机理

通过操作DRIFTS结合多元光谱分析研究了负责氧化铟上NO 2气体传感的表面物质。它揭示了表面亚硝酸盐在依赖温度的气体传感机制中的重要作用以及此类亚硝酸盐与表面羟基的相互作用。具有高浓度的表面吸附H 2 O的高度羟基化的表面有利于提高以亚硝酸盐形式存在的NO 2的吸附浓度,因此可以说明在较低的工作温度下具有出色的传感响应。
更新日期:2017-09-07
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