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J Hazard Mater

Title:		Redox properties and VOC oxidation activity of Cu catalysts supported on Ce(1)-xSmxOdelta mixed oxides
Author(s):		Konsolakis M; Carabineiro SA; Tavares PB; Figueiredo JL;
Address:		"Laboratory of Physical Chemistry & Chemical Processes, Department of Sciences, Technical University of Crete, University Campus, 73100 Chania, Greece. Electronic address: mkonsol@science.tuc.gr"
Journal Title:		J Hazard Mater
Year:		2013
Volume:		20130814
Issue:
Page Number:		512 - 521
DOI:		10.1016/j.jhazmat.2013.08.016
ISSN/ISBN:		1873-3336 (Electronic) 0304-3894 (Linking)
Abstract:		"A series of Cu catalysts supported on Ce1-xSmxOdelta mixed oxides with different molar contents (x=0, 0.25, 0.5, 0.75 and 1), was prepared by wet impregnation and evaluated for volatile organic compounds (VOC) abatement, employing ethyl acetate as model molecule. An extensive characterization study was undertaken in order to correlate the morphological, structural and surface properties of catalysts with their oxidation activity. The optimum performance was obtained with Cu/CeO2 catalyst, which offers complete conversion of ethyl acetate into CO2 at temperatures as low as 260 degrees C. The catalytic performance of Cu/Ce1-xSmxOdelta was interpreted on the basis of characterization studies, showing that incorporation of samarium in ceria has a detrimental effect on the textural characteristics and reducibility of catalysts. Moreover, high Sm/Ce atomic ratios (from 1 to 3) resulted in a more reduced copper species, compared to CeO2-rich supports, suggesting the inability of these species to take part in the redox mechanism of VOC abatement. Sm/Ce surface atomic ratios are always much higher than the nominal ratios indicating an impoverishment of catalyst surface in cerium oxide, which is detrimental for VOC activity"
Keywords:		Acetates/*chemistry Air Pollutants/*chemistry Catalysis Cerium/*chemistry Copper/*chemistry Oxidation-Reduction Oxides/*chemistry Samarium/*chemistry Volatile Organic Compounds/chemistry Cu/Ce(1-x)Sm(x)O(delta) catalysts Ethyl acetate Volatile organic com;
Notes:		"MedlineKonsolakis, Michalis Carabineiro, Sonia A C Tavares, Pedro B Figueiredo, Jose L eng Research Support, Non-U.S. Gov't Netherlands 2013/09/03 J Hazard Mater. 2013 Oct 15; 261:512-21. doi: 10.1016/j.jhazmat.2013.08.016. Epub 2013 Aug 14"