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• W2022190308 endingPage "860" @default.
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• W2022190308 abstract "Fuel cells have risen as a clean technology for power generation and much effort has been done for converting renewable feedstock in hydrogen. The water-gas shift reaction (WGS) can be applied aiming at reducing the CO concentration in the reformate. As Pt/CeO 2 catalysts have been pointed out as an alternative to the industrial WGS catalysts, the modification of such systems with magnesium was investigated in this work. It was shown that the addition of MgO to Pt/CeO 2 increased the activity and stability of the catalyst irrespective of the preparation method used, either impregnation or co-precipitation. Based on TPR and IR spectroscopy experiments, it was seen that the presence of magnesium improved ceria reduction favoring the creation of OH groups, which are considered the active sites for the WGS reaction. The evolution of the surface species formed under reaction conditions (CO, H 2 O, H 2 ) observed by DRIFTS evidenced that the formation of formate species and the generation of CO 2 is closely attached to each other; under a reaction stream containing hydrogen the presence of formate species showed to be more relevant while the CO 2 formation was hindered. It is suggested that the addition of MgO favors the formate decomposition and lower the carbonate concentration on the catalyst surface during WGS reaction." @default.
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• W2022190308 date "2007-03-01" @default.
• W2022190308 modified "2023-09-24" @default.
• W2022190308 title "Water-gas shift reaction over magnesia-modified Pt/CeO2 catalysts" @default.
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• W2022190308 doi "https://doi.org/10.1016/j.jpowsour.2006.12.054" @default.
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