| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5351503 | Applied Surface Science | 2014 | 4 Pages |
Abstract
Computational study of NO2 sensing on the WO3 (0Â 0Â 1) surface is presented. Our ab initio calculations reveal a two-step process of NO2 detection on the WO3 surface. In a first step the NO2 molecule is dissociated at an oxygen vacancy site, but a NO molecule remains adsorbed. In a second step NO is re-oxidized into NO2 by O2 of the surrounding air leading to the resistance increase which is experimentally observed. We also calculate the adsorption energy of NO on stoichiometric and non-stoichiometric WO3 surfaces and propose a method for the NO detection.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Lama Saadi, Caroline Lambert-Mauriat, Vincent Oison, Hela Ouali, Roland Hayn,