Search

Your search keyword '"Wang, Xin-Ge"' showing total 25 results
Start Over Author "Wang, Xin-Ge"
25 results on '"Wang, Xin-Ge"'

13. Iron doping boosts the reactivity and stability of the γ-Al2O3 nanosheet supported cobalt catalyst for propane dehydrogenation.

Author

Zhang, Chang-Wu, Wen, Jing, Wang, Lei, Wang, Xin-Ge, and Shi, Lei

Subjects
COBALT catalysts, COBALT, CHROMIUM catalysts, DEHYDROGENATION, STEAM reforming, PROPANE, X-ray powder diffraction
Abstract

Supported cobalt catalysts are a promising but immature alternative for the noble metallic platinum and poisonous chromium oxide catalysts widely used in the industrial process of propane dehydrogenation. There is still a large amount of scope to modulate its geometric and electronic structure to optimize its catalytic performance in propane dehydrogenation. In this work, we report that iron doping efficiently promotes the generation of active tetrahedral Co2+ species in cobalt tetroxide supported on the γ-Al2O3 nanosheet, as disclosed by multiple analytical techniques involving X-ray powder diffraction, UV-vis diffuse reflection spectroscopy, X-ray photoelectron spectroscopy, and hydrogen temperature-programmed reduction. In the propane dehydrogenation reaction, such a system presents an enhancement on the activity and selectivity compared with its cobalt only catalyst counterpart. The optimal loading amounts of cobalt and iron were identified to be 5 wt% and 1.6 wt%, respectively. Structural analysis reveals that a strong interaction of iron with the oxygen ligand weakens the π domination of oxygen into the adjacent cobalt centre, accordingly promoting the catalytic activity and selectivity of cobalt in propane dehydrogenation. An increase in the anti-reductive capability triggered by iron doping evidently improves the durability of such a catalyst in propane dehydrogenation. It's also noted that the surface coordinatively unsaturated Al3+ sites of the γ-Al2O3 nanosheet synergistically boost the dehydrogenation activity of the cobalt catalyst. This research provides a new strategy for improving the reactivity and stability of the cobalt catalyst in the field of alkane dehydrogenation. [ABSTRACT FROM AUTHOR]

Published
2020
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results