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Title

Viability of Au/CeO2-ZnO/Al2O3 catalysts for pure hydrogen production by the water-gas shift reaction

AuthorsReina, Ramsés ; Ivanova, Svetlana ; Delgado, Juan José; Ivanov, Ivan; Idakiev, Vasko; Tabakova, Tatiana; Centeno, Miguel Ángel ; Odriozola, José Antonio
Issue Date2014
CitationCHEMCATCHEM 6: 1401- 1409 (2014)
AbstractThe 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 CeO 2-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/CeO 2/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. Zinc booster: A series of gold catalysts supported on ZnO-promoted CeO2-Al2O3 are applied in the purification of H2 streams through the water-gas shift reaction. The addition of ZnO promotes the activity of an Au/CeO 2/Al2O3 catalyst. This increase in activity is mainly associated with the enhanced O2 storage capacity of the Zn-containing solids. The prepared catalysts tolerate start-stop cycles, showing potential for industrial application. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
URIhttp://hdl.handle.net/10261/100952
DOI10.1002/cctc.201300992
Identifiersdoi: 10.1002/cctc.201300992
issn: 1867-3899
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