期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 122, 期 1, 页码 14-19出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2006.05.001
关键词
gallium oxynitride; thick-film sensors; propane detection mechanism; temperature programmed desorption-mass spectrometry
The detection mechanism of propane by gallium oxynitride (GaON) sensors was investigated. The electrical resistance of the sensors was monitored during propane exposure (0, 15, 30, 50 and 100 ppm) in dry and humid atmosphere (10% relative humidity at room temperature), at different oxygen concentrations (0, 2, 5, 10 and 20%). Temperature programmed desorption-mass spectrometry (TPD-MS) was used to investigate the species desorbing from the surface of GaON after exposure to propane at 250 degrees C and 350 degrees C. The detected species were propene, propane, CO, CO2, NH3 and H2O. This study demonstrates that the oxidative dehydrogenation (ODH) of propane on GaON can take place without oxygen in the gaseous phase, thus implying a redox Mars-van Krevelen mechanism, which involves the contribution of lattice oxygen and possibly nitrogen during the activation of propane on the sensor surface. (c) 2006 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据