期刊
CHEMCATCHEM
卷 11, 期 19, 页码 4765-4776出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201901108
关键词
copper; ceria; hydrothermal synthesis; hydrogen; CO-PROX
A series of highly active and selective CuCeOx catalysts was prepared via appropriate tuning of the parameters (concentration, temperature) of a citrates-hydrothermal method. The obtained catalysts were characterized by various physicochemical techniques such as (in-situ) X-ray diffraction (XRD), N-2 adsorption-desorption, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM), while preferential oxidation of CO (CO-PROX) in H-2-rich stream was used as probe reaction. Suitable modification of the hydrothermal parameters resulted in catalysts with remarkable performance in CO-PROX reaction, which was strongly dependent on the concentration of oxygen vacancies and reduced copper species.
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