Low-Temperature CO oxidation on multicomponent gold based catalysts

• Main Authors: Tomas eRamirez Reina, Svetlana eIvanova, Miguel Angel eCenteno, Jose Antonio eOdriozola
• Format: Article
• Language: English
• Published: Frontiers Media S.A. 2013-09-01
• Series: Frontiers in Chemistry
• Subjects: iron oxide; Cerium oxide; CO oxidation; gold catalysts; mixed oxides
• Online Access: http://journal.frontiersin.org/Journal/10.3389/fchem.2013.00012/full
• ISSN: 2296-2646

In this work the development of gold catalysts, essentially based on γ-alumina with small superficial fraction of Ce-Fe mixed oxides as support for the low temperature CO oxidation is proposed. Characterization results obtained by means of XPS, UV-Vis spectroscopy and H2-TPR are employed to correlate the activity data with the catalysts composition. The bare γ-alumina supported gold catalyst demonstrates the poorest activity within the series. The addition of CeO2 or FeOX improves the catalytic performance, especially observed for the CeO2-FeOx mixed oxide doped samples. This enhanced CO oxidation activity was related to the Ce-Fe interaction producing materials with promoted redox properties and therefore oxidation activity