Cu-Ce-O mixed oxides from Ce-containing layered double hydroxide precursors: Controllable preparation and catalytic performance

Journal Article · Thu Dec 15 00:00:00 EST 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.09.035· OSTI ID:21612821

Na, Zhao; Junfeng, Liu ^[1]; Evans, David G; Xue, Duan ^[1]; Forano, Claude; Roy, Marie de ^[2]

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1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029 (China)
2. Laboratoire des Materiaux Inorganiques, UMR CNRS 6002, Universite Blaise Pascal, 24 avenue des Landais, 63177 Aubiere (France)

Cu/Zn/Al layered double hydroxide (LDH) precursors have been synthesized using an anion exchange method with anionic Ce complexes containing the dipicolinate (pyridine-2,6-dicarboxylate) ligand. Cu-Ce-O mixed oxides were obtained by calcination of the Ce-containing LDHs. The materials were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetry-differential thermal analysis, elemental analysis, and low temperature N{sub 2} adsorption/desorption measurements. The results reveal that the inclusion of Ce has a significant effect on the specific surface area, pore structure, and chemical state of Cu in the resulting Cu-Ce-O mixed metal oxides. The resulting changes in composition and structure, particularly the interactions between Cu and Ce centers, significantly enhance the activity of the Ce-containing materials as catalysts for the oxidation of phenol by hydrogen peroxide. - Graphical Abstract: Cu-Ce-O mixed oxides calcined from [Ce(dipic){sub 3}]{sup 3-}- intercalated Cu/Zn/Al layered double hydroxides were synthesized and displayed good catalytic performances in phenol oxidation due to the Cu-Ce interactions. Highlights: Black-Right-Pointing-Pointer [Ce(dipic){sub 3}]{sup 3-}-intercalated Cu/Zn/Al layered double hydroxides were synthesized. Black-Right-Pointing-Pointer Cu-Ce-O mixed oxides derivated from the LDHs were characterized as catalysts. Black-Right-Pointing-Pointer Presence of Ce influenced physicochemical property and catalytic performance. Black-Right-Pointing-Pointer Cu-Ce interaction was largely responsible for enhanced catalytic ability.

• OSTI ID: 21612821
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 12; Other Information: DOI: 10.1016/j.jssc.2011.09.035; PII: S0022-4596(11)00528-7; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

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37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ADSORPTION
CALCINATION
CERIUM COMPLEXES
CHEMICAL STATE
DESORPTION
DIFFERENTIAL THERMAL ANALYSIS
FOURIER TRANSFORM SPECTROMETERS
HYDROGEN PEROXIDE
HYDROXIDES
INTERACTIONS
OXIDATION
OXIDES
PHENOL
PORE STRUCTURE
PRECURSOR
PYRIDINE
SPECIFIC SURFACE AREA
THERMAL GRAVIMETRIC ANALYSIS
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY
AROMATICS
AZINES
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COHERENT SCATTERING
COMPLEXES
DECOMPOSITION
DIFFRACTION
ELECTRON SPECTROSCOPY
GRAVIMETRIC ANALYSIS
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
MEASURING INSTRUMENTS
MICROSTRUCTURE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PEROXIDES
PHENOLS
PHOTOELECTRON SPECTROSCOPY
PHYSICAL PROPERTIES
PYRIDINES
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
RARE EARTH COMPLEXES
SCATTERING
SORPTION
SPECTROMETERS
SPECTROSCOPY
THERMAL ANALYSIS
THERMOCHEMICAL PROCESSES