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Open AccessArticle

Molybdenum Dopped Copper Ferrites as Active Catalysts for Alcohols Oxidative Coupling

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Laboratory of Chemical Technology and Catalysis, Department of Organic Chemistry, Biochemistry & Catalysis, Faculty of Chemistry, University of Bucharest, 4-12, Blv. Regina Elisabeta, 030018 Bucharest, Romania
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School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
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Authors to whom correspondence should be addressed.
Materials 2019, 12(11), 1871; https://doi.org/10.3390/ma12111871
Received: 23 May 2019 / Revised: 4 June 2019 / Accepted: 5 June 2019 / Published: 10 June 2019
Copper ferrites dopped with molybdenum were studied in an oxidative coupling reaction between methanol and ethanol in the gas phase. The catalysts have been characterized by X-ray diffraction, where the presence of ferrite, magnetite, and tenorite phases was observed; scanning electron microscopy; UV-Vis spectroscopy; and Fourier-transform infrared spectroscopy, which highlighted the presence of octahedral coordination of isolated molybdena species. The catalyst with the highest activity in this reaction and with the highest selectivity to hydroxyacetone is the one that presents Lewis sites with weak acidity. The methyl and ethyl acetate selectivities are directly proportional to the Cu/Fe ratio. It has been observed that the presence of reduced copper sites is responsible for the selectivity in esters, while the presence of reduced iron and molybdenum sites is responsible for the acetol production. View Full-Text
Keywords: oxidative coupling; hydroxyacetone; molybdenum–copper ferrites; methyl acetate; ethyl acetate oxidative coupling; hydroxyacetone; molybdenum–copper ferrites; methyl acetate; ethyl acetate
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Mitran, G.; Chen, S.; Seo, D.-K. Molybdenum Dopped Copper Ferrites as Active Catalysts for Alcohols Oxidative Coupling. Materials 2019, 12, 1871.

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