Time-resolved, in situ DRIFTS/EDE/MS studies on alumina supported Rh catalysts: effects of ceriation on the Rh catalysts in the process of CO oxidation
A. Kroner, M. Newton, M. Tromp, A. Russell, A. Dent, J. Evans
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引用次数: 1
Abstract
Abstract The effect of ceria doping by oxide surface modification and controlled metal surface modification (CSM) on the structure-function properties of Rh/γ-Al2O3 catalysts in the process of CO oxidation were studied by a combined array of Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS)/Energy Dispersive X-ray Absorption Fine Structure/Mass Spectrometry techniques applied simultaneously under time-resolved, in situ conditions in the temperature range of 298–573 K. The addition of each promoter element by CSM exhibits multiple effects on the catalysts structure. The DRIFTS/XAS studies indicate that CeOx facilitate the protection of Rh particles against extensive oxidation in atmospheres of air, O2 and CO, without reducing the coverage of oxidisable adsorbed CO.
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