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Catalysts 2016, 6(3), 37; doi:10.3390/catal6030037

Gold-Iron Oxide Catalyst for CO Oxidation: Effect of Support Structure

1
Key Laboratory for Colloid and Interface Chemistry, Key Laboratory of Special Aggregated Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
2
Key Laboratory of Interfacial Physics and Technology, Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Michalis Konsolakis
Received: 26 November 2015 / Revised: 11 January 2016 / Accepted: 26 January 2016 / Published: 7 March 2016
(This article belongs to the Special Issue Surface Chemistry and Catalysis)
View Full-Text   |   Download PDF [5691 KB, uploaded 7 March 2016]   |  

Abstract

Gold-iron oxide (Au/FeOx) is one of the highly active catalysts for CO oxidation, and is also a typical system for the study of the chemistry of gold catalysis. In this work, two different types of iron oxide supports, i.e., hydroxylated (Fe_OH) and dehydrated iron oxide (Fe_O), have been used for the deposition of gold via a deposition-precipitation (DP) method. The structure of iron oxide has been tuned by either selecting precipitated pH of 6.7–11.2 for Fe_OH or changing calcination temperature of from 200 to 600 °C for Fe_O. Then, 1 wt. % Au catalysts on these iron oxide supports were measured for low-temperature CO oxidation reaction. Both fresh and used samples have been characterized by multiple techniques including transmission electron microscopy (TEM) and high-resolution TEM (HRTEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), X-ray absorption near edge structure (XANES) and temperature-programmed reduction by hydrogen (H2-TPR). It has been demonstrated that the surface properties of the iron oxide support, as well as the metal-support interaction, plays crucial roles on the performance of Au/FeOx catalysts in CO oxidation. View Full-Text
Keywords: gold catalyst; iron oxide; CO oxidation; support effect; metal-support interaction gold catalyst; iron oxide; CO oxidation; support effect; metal-support interaction
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Cui, H.-Z.; Guo, Y.; Wang, X.; Jia, C.-J.; Si, R. Gold-Iron Oxide Catalyst for CO Oxidation: Effect of Support Structure. Catalysts 2016, 6, 37.

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