| 5 | Enhanced activity of bimetallic Fe-Cu catalysts supported on ceria toward water gas shift reaction: synergistic effect显示文摘Within the“hydrogen chain”,the high-temperature water gas shift reaction represents a key step to improve the H2 yield and adjust the H2/COx ratio to fit the constraints of downstream processes.Despite the commercial application of the high-temperature water gas shift,novel catalysts characterized by higher intrinsic activity(especially at low temperatures),good thermal stability,and no chromium content are needed.In this work,we propose bimetallic iron-copper catalysts supported on ceria,characterized by low active phase content(iron oxide+copper oxide<5 wt%).Fresh and used samples were characterized by inductively coupled plasma mass spectrometry,X-ray diffraction,nitrogen physisorption,scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy,and temperature programmed reduction in hydrogen to relate physicochemical features and catalytic activity.The sample with iron/copper≈1 and 4 wt%active phase content showed the best catalytic properties in terms of turnover frequency,no methane formation,and stability.Its unique properties were due to both strong iron-copper interaction and strong metal-support interaction,leading to outstanding redox behavior. | Gianluca Landi Giulia Sorbino Fortunato Migliardini Giovanna Ruoppolo Almerinda Di Benedetto | 2023 | Frontiers of Chemical Science and Engineering2023，17，12： | 0 |
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