Abstract
In this work, diffuse reflectance infrared Fourier transformation (DRIFT) spectroscopy of adsorbed CO was studied to investigate the stability of Pt/ZrO 2 catalysts for partial oxidation of methane. The studies confirmed that the preparation method has a significant effect on the catalyst performance and the catalyst treatment using argon glow discharge plasma improves the catalyst stability. TG analysis showed that coke formation is not significant on both samples with and without glow discharge plasma treatment, indicating the coke formation is not responsible for the catalyst deactivation. The IR band intensity of adsorbed CO decreases remarkably with increasing calcination temperature, suggesting the sintering of Pt particles in the presence of O 2. The sintering of plasma treated sample is slower than that of the untreated sample, especially at higher temperature, which indicates that the plasma treated sample is more resistant to sintering under the oxidizing atmosphere.
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