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Author Bokhimi, X. ♦ Novaro, O. ♦ Gonzalez, R. D. ♦ Lopez, T. ♦ Chimal, O. ♦ Asomoza, A. ♦ Gomez, R.
Sponsorship Consejo Nacional de Ciencia y Tecnologia (CONACYT), Mexico City (Mexico) ♦ National Science Foundation, Washington, DC (United States)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ ENVIRONMENTAL SCIENCES ♦ PHASE STUDIES ♦ COPPER ♦ TITANIUM OXIDES ♦ COMPOSITE MATERIALS ♦ DECOMPOSITION ♦ NITROGEN OXIDES ♦ CATALYSTS ♦ REDOX REACTIONS ♦ X-RAY DIFFRACTION ♦ EXPERIMENTAL DATA
Abstract Cu/TiO{sub 2} catalyst was synthesized by cogelling CuSO{sub 4}, or CuCl{sub 2}, with titanium ethoxide. Samples were nanocrystalline with titania phase concentration that depended on copper precursor and sample annealing temperature. Phase quantitative analysis was performed by refining crystalline structure. The fresh samples prepared with CuSO{sub 4} contained almost amorphous rutile with an average crystallite size of 1.4(1)nm. Average crystallite sizes correlated well to BET areas, which were large for fresh samples and for those calcined at 400 C, and only a few square meters per gram of those calcined at 800 C. Hydrogen consumption of the samples prepared with CuSO{sub 4} was 20 times larger than in those prepared with CuCl{sub 2}. Reduction temperature and hydrogen consumption, which are determined by copper-titania interaction, can be explained in terms of the main defects found in nanocrystalline titania phases: titanium vacancies and hydroxyls in their crystalline structure.
ISSN 00224596
Educational Use Research
Learning Resource Type Article
Publisher Date 1999-05-01
Publisher Place United States
Journal Journal of Solid State Chemistry
Volume Number 144
Issue Number 2


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