Enhanced activity of bimetallic Fe-Cu catalysts supported on ceria toward water gas shift reaction: synergistic effect  

作　　者：Gianluca Landi Giulia Sorbino Fortunato Migliardini Giovanna Ruoppolo Almerinda Di Benedetto 

机构地区：[1]Institute of Sciences and Technologies for Sustainable Energy and Mobility-CNR,Naples 80125,Italy [2]Department of Chemical,Materials and Production Engineering,University of Naples Federico Ⅱ,Naples 80125,Italy

出　　处：《Frontiers of Chemical Science and Engineering》2023年第12期1962-1972,共11页化学科学与工程前沿（英文版）

摘　　要：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.

关 键 词：water gas shift IRON copper bimetallic catalysts CERIA hydrogen 

分 类 号：O64[理学—物理化学]