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Viability of Au/CeO₂–ZnO/Al₂O₃ Catalysts for Pure Hydrogen Production by the Water–Gas Shift Reaction

ICMS

Tomás Ramírez Reina, Svetlana Ivanova, Juan José Delgado, Ivan Ivanov, Vasko Idakiev ,Tatyana Tabakova, Miguel Angel Centeno, José Antonio Odriozola ChemCatChem 2014, Vol. 10, 1401-1409

The production of H₂ pure enough for use in fuel cells requires the development of very efficient catalysts for the water–gas shift reaction. Herein, a series of gold catalysts supported on ZnO-promoted CeO₂–Al₂O₃ are presented as interesting systems for the purification of H₂ streams through the water–gas shift reaction. The addition of ZnO remarkably promotes the activity of an Au/CeO₂/Al₂O₃ catalyst. This increase in activity is mainly associated with the enhanced oxygen storage capacity exhibited for the Zn-containing solids. High activity and good stability and resistance towards start-up–shut-down situations was found, which makes these catalysts a promising alternative for CO clean-up applications.