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Dehydrogenation

About: Dehydrogenation is a research topic. Over the lifetime, 24238 publications have been published within this topic receiving 480028 citations. The topic is also known as: Dehydrogenation.


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Journal ArticleDOI
TL;DR: In this article, a review summarizes published data on catalytic performances of different vanadium-containing oxides, including unsupported and supported V2O5, vanadates, solid solutions and mixed phases, in the oxidative dehydrogenation of C2-C5 alkanes.
Abstract: This review summarizes published data on catalytic performances of different vanadium-containing oxides, including unsupported and supported V2O5, vanadates, solid solutions and mixed phases, in the oxidative dehydrogenation of C2–C5 alkanes. The analysis of the structure-activity relationships shows that various species characterized by a different reactivity exist on the surface of these catalysts. There are some indications that tetrahedral vanadium species are the most favourable for alkane oxidehydrogenation. Its intrinsic activity seems to be largely dependent on the structure of the nearest surrounding and, therefore, can be modified by changing the nature and number of the neighbouring ions. Although the reaction mechanism is generally accepted to be through the redox cycle between V5+ and V4+, opposite relationships between catalyst activity/selectivity and reducibility have been established, even for the same catalytic systems. No clear interpretation regarding the mode of alkane activation can be derived from a survey of the literature. This and some other aspects of the reaction mechanism need further studies at a molecular level.

599 citations

Journal ArticleDOI
TL;DR: In this paper, the deactivation of catalysts has been investigated in the presence of palladium and platinum catalysts under mild conditions (293 −353 K and atmospheric pressure) and several causes of deactivation have been put forward: oxidation of metal, blocking of active sites by strong adsorption of sideproducts, metal leaching and growth of platinum crystallites.

593 citations

Journal ArticleDOI
J. H. Sinfelt1, J.L. Carter1, D.J.C. Yates1
TL;DR: In this article, the effect of adding copper to nickel was investigated for the hydrogenolysis of ethane to methane and the dehydrogenation of cyclohexane to benzene over a series of copper-nickel alloys.

585 citations

Journal ArticleDOI
TL;DR: NMR studies in conjunction with DFT/GIAO chemical shift calculations indicate that both polyaminoborane and the diammoniate of diborane, [(NH3)2BH2+]BH4-, are initial products in the reactions.
Abstract: Ionic liquids are shown to provide advantageous media for amineborane-based chemical hydrogen storage systems. Both the extent and rate of hydrogen release from ammonia borane dehydrogenation are significantly increased at 85, 90, and 95 degrees C when the reactions are carried out in 1-butyl-3-methylimidazolium chloride compared to analogous solid-state reactions. NMR studies in conjunction with DFT/GIAO chemical shift calculations indicate that both polyaminoborane and the diammoniate of diborane, [(NH3)2BH2+]BH4-, are initial products in the reactions.

580 citations

Journal ArticleDOI

576 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023946
20221,706
20211,084
20201,178
20191,110
20181,097