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Development of Highly Selective and Reactive Catalysts for Preferential Oxidation of CO in Reformed Gas -- Activity and Mechanism at Pt-Alloys/Mordenite Catalysts

机译:高效氧化在重整气体活性的优先氧化和Pt-合金/ Mordenite催化剂中的高度选择性和反应性催化剂的研制

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摘要

Polymer electrolyte fuel cells operating on reformed fuels require CO removal from feed streams to a certain level (e. g. 10 ppm). We have found that Pt, Ru, Pt-Ru and Pt-Fe supported on mordenite oxidize CO much preferentially in H_2-rich gas in comparison with a conventional Pt/Al_2O_3 catalyst. Pt-Fe/mordenite (Pt-Fe/M) exhibited the highest activity and selectivity (ca. 100 percent) for CO oxidation, especially at low temperature below 200 deg C. Such high activity and selectivity for CO oxidation on Pt-Fe/M were not affected by the presence of 25 percent CO_2 and 20 percent H_2O.
机译:在重整燃料上运行的聚合物电解质燃料电池需要从进料流中的饲料流去除一定水平(例如10 ppm)。 我们发现,与常规Pt / Al_2O_3催化剂相比,Pt,Ru,Pt-Ru和Pt-Fe优先于H_2的气体中优先于H_2的气体中得到氧化CO。 PT-Fe / Mordenite(PT-Fe / M)表现出最高的活性和选择性(CA.100%)用于共氧化,特别是在低温下低于200℃的低温。在PT-Fe上的CO氧化方面的高活性和选择性 M不受25%CO_2和20%H_2O的存在影响。

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