Adsorption behavior of CO and interfering gases on SnO2
作者： Jun Tamaki , Masaki Nagaishi , Yasutake Teraoka , Norio Miura , Noboru Yamazoe
DOI: 10.1016/0039-6028(89)90574-8
关键词: Adsorption 、 Combustion 、 Oxygen 、 Oxidation state 、 Inorganic chemistry 、 Catalytic oxidation 、 Water vapor 、 Base (chemistry) 、 Carbon monoxide 、 Chemistry
摘要: Abstract As a base for developing combustion monitor sensor using SnO2, the adsorption-desorption behavior of CO, NO, NO2, and H2O on SnO2 surface, as well interference among them, were investigated TPD technique. CO was captured by surface oxygen, especially oxygen adsorbed became carbonate species at room temperature. Both NO NO2 in three different forms, depending oxidation state SnO2: nitrito type two nitrosyi types. On heating these desorbed almost exclusively NO. Water vapor molecular adsorbate, hydroxyl. The latter adsorption strongly influenced SnO2. Coadsorption experiments revealed that presence caused significant reduction adsorption. It concluded strong adsorbates gases, i.e., hydroxyls, preferentially block sites. interfering effect or also manifested itself catalytic surface.
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