NDLI: Catalytic activity for CO oxidation of Cu–CeO<sub>2</sub> composite nanoparticles synthesized by a hydrothermal method

Content Provider	Royal Society of Chemistry (RSC)
Author	Cai, Yun Chen, Nan Li, Yuxiu Xing, Xinxin Deng, Dongyang Wang, Yude
Copyright Year	2015
Abstract	A facile hydrothermal method has been developed for the synthesis of nanosized Cu–CeO2 composites with various Cu contents. The obtained catalysts, with a Cu/CeO2 atomic ratio in the range of 0–40%, were characterized as to their structure, morphology, and redox features by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, N2 physisorption, and temperature programmed reduction with hydrogen. The experimental results show that the particles are highly crystalline CeO2 nanopowders of 5–8 nm primary particle size and the Cu nanoparticles indeed coexist with the CeO2 nanoparticles (cubic fluorite CeO2). The influence of Cu contents on their catalytic performance for CO oxidation was also studied. As for the catalytic reactivity, nanosized Cu–CeO2 composites have a higher catalytic activity than CeO2 in CO oxidation. It is ascribed to the effect between the cycle transition of Ce4+/Ce3+, oxygen vacancies and surface area, which are induced by copper. The catalytic activity of the Cu–CeO2 composites exhibits Cu content dependence where the best catalytic activity occurs at a Cu/CeO2 atomic ratio of 30%. In addition, nanosized Cu–CeO2 composites also show high catalytic activity for selective oxidation of CO in excess H2 at relatively low temperature.
Starting Page	3238
Ending Page	3245
Page Count	8
File Format	HTM / HTML PDF
ISSN	17599660
Volume Number	7
Issue Number	7
Journal	Analytical Methods
DOI	10.1039/c5ay00261c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	X-ray crystallography Cu Oxygen Transmission electron microscopy Fluorite Hydrothermal circulation Hydrogen Redox Copper Correlation and dependence Scanning electron microscope Physisorption
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Engineering Chemical Engineering

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