Aqueous phase semihydrogenation of alkynes over Ni-Fe bimetallic catalysts

Rohit Kumar Rai, Mahendra K. Awasthi, Vipin K. Singh, Sudipta Roy Barman, Silke Behrens, Sanjay K. Singh

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Bimetallic Ni-Fe catalysts (Ni/Fe, 1 : 1, 1 : 3, and 3 : 1) are synthesized and explored for their catalytic activity in semihydrogenation of internal alkynes using H2 gas in water-ethanol solution. Our findings revealed that over the Ni1Fe3 catalyst a high diastereoselectivity for Z-alkenes with a high conversion for a wide range of internal alkynes can be achieved at moderate reaction temperature (40 °C). Notably, the selectivity for the Z-alkenes is enhanced in the presence of n-butyl amine as an additive. Deuterium labeling experiments evidenced that H2 gas becomes dissociated homolytically over the catalyst surface to hydrogenate alkynes to alkenes. Synthesized catalysts were successfully characterized by HR-TEM, SEM, XPS, EDS, P-XRD and H2-TPD.
Original languageEnglish (US)
Pages (from-to)4968-4980
Number of pages13
JournalCatalysis Science and Technology
Volume10
Issue number15
DOIs
StatePublished - Jun 22 2020

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