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Effect of reduction temperature on structure and catalytic performance of mesoporous Ni-Fe-Al2O3 in oxidative dehydrogenation of ethane

Abstract

The effect of reduction temperature on the structure of mesoporous Ni-Fe-Al2O3 catalysts and their catalytic activity for oxidative dehydrogenation of ethane (ODH) are investigated. Low reduction temperature at 400 oC leads to the reduction of Fe3+-based oxide to lower valance FeOx species, but nickel ion in [-Ni-O-Al-] framework cannot be reduced at this temperature. These highly dispersed Ni2+-based oxide and FeOx species with close proximity contribute to ethane dehydrogenation and N2O decomposition, respectively. When the reduction temperature is increased to 600 °C, a continuous reduction and migration of Ni2+ from the bulk phase to the surface took place, forming 5-6 nm isolated metallic Ni nanoparticles which resulted in a decrease in catalyst activity under this condition. Thus highly dispersed Ni2+-based oxide and FeOx species with close proximity effectively contributes to selective conversion of ethane to ethylene.

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Supplementary files

Article information


Submitted
24 May 2020
Accepted
08 Oct 2020
First published
15 Oct 2020

New J. Chem., 2020, Accepted Manuscript
Article type
Paper

Effect of reduction temperature on structure and catalytic performance of mesoporous Ni-Fe-Al2O3 in oxidative dehydrogenation of ethane

X. Xu, S. Kumar, X. Xia, A. Toghan, A. Feldhoff, Y. Zhang and H. Jiang, New J. Chem., 2020, Accepted Manuscript , DOI: 10.1039/D0NJ02618B

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