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Issue 12, 2012
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Design of amphoteric mixed oxides of zinc and Group 3 elements (Al, Ga, In): migration effects on basic features

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Abstract

The design of new amphoteric catalysts is of great interest for several industrial processes, especially those covering dehydration and dehydrogenation phenomena. Adsorption microcalorimetry was used to monitor the design of mixed oxides of zinc with Group 3 elements (aluminium, gallium, indium) with amphoteric character and enhanced specific surface area. Acid–base features were found to evolve non-linearly with the relative amounts of metal, and the strengths of the created acidic or basic sites were measured by adsorption microcalorimetry. A panel of bifunctional catalysts of various acid–base (amounts, strengths) and redox character was obtained. Besides, special interest was given to In–Zn mixed oxides for their enhanced basicity: this series of catalysts displays important basic features of high strength (Image ID:c2cp23613c-t1.gif) in substantial amounts (Image ID:c2cp23613c-t2.gif), whose impact on efficiency or selectivity in catalytic dehydration/dehydrogenation can be valuable.

Graphical abstract: Design of amphoteric mixed oxides of zinc and Group 3 elements (Al, Ga, In): migration effects on basic features

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Publication details

The article was received on 16 Nov 2011, accepted on 27 Jan 2012 and first published on 27 Jan 2012


Article type: Paper
DOI: 10.1039/C2CP23613C
Citation: Phys. Chem. Chem. Phys., 2012,14, 4155-4161
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    Design of amphoteric mixed oxides of zinc and Group 3 elements (Al, Ga, In): migration effects on basic features

    A. Mekki-Berrada, D. Grondin, S. Bennici and A. Auroux, Phys. Chem. Chem. Phys., 2012, 14, 4155
    DOI: 10.1039/C2CP23613C

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