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Characterization and reactivity of α-Al2O3-supported Pt-Co bimetallic catalysts

✍ Scribed by Tang, S.; Lin, J.; Tan, K. L.

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
104 KB
Volume
28
Category
Article
ISSN
0142-2421

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✦ Synopsis

Bimetallic Pt-Co and monometallic Pt and Co catalysts in as-prepared and reduced states were characterized by X-ray diffraction, temperature-programmed reduction, XPS and Farier transform infrared spectroscopy (FTIR). Temperature-programmed reduction and XPS results showed that the addition of platinum lowered the reduction temperature of cobalt oxides and simultaneously increased the amount of cobalt surface phase. The metallic Pt and Co in bimetallic Pt-Co catalysts was found to be highly dispersed in supports. In situ FTIR study of CO adsorption on catalysts confirmed that there was either strong interaction between metallic Pt and Co, or a Pt-Co bimetallic interphase was formed. The CO 2 reforming of methane to synthesis gas was also investigated. Both Pt and Co in Pt-Co bimetallic catalysts exerted catalytic activity on CO 2 reforming of methane. The coking was effectively inhibited over Pt-Co bimetallic catalysts, which was attributed to the formation of a Pt-Co bimetallic interphase and the increase of cobalt surface phase.

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