| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 62518 | Journal of Catalysis | 2008 | 9 Pages |
Abstract
The water–gas shift reaction was studied in either direction on β-Ga2O3 samples with different surface chemistries: a fully oxidized surface, a hydrogen-pretreated surface with and without oxygen vacancies present, and an oxygen-defective surface without adsorbed hydrogen. The samples were characterized by volumetric adsorption measurements and temperature-programmed desorption and reaction techniques. The reaction in both directions was observed to follow two parallel mechanistic pathways, namely formate- and oxygen vacancy-assisted mechanisms, with relative rate contributions depending on temperature and sample pretreatment.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Wilfrid Jochum, Simon Penner, Reinhard Kramer, Karin Föttinger, Günther Rupprechter, Bernhard Klötzer,