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

11 Scopus citations


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
Issue number15
StatePublished - Jun 22 2020

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work is financially supported by the Science and Engineering Research Board, New Delhi (EMR/2016/005783) and Council of Scientific and Industrial Research, New Delhi (01(2885)/17/EMR-II) and the Indian Institute of Technology Indore, India. SIC, IIT Indore, UGC-DAE, Indore and IKFT-KIT are acknowledged for the instrumentation facilities. R.K.R. thanks IIT Indore for his research associateship. M.K.A. thanks INSPIRE for senior research fellowship. We would like to acknowledge Martin Hähsler for support with TEM analysis.


Dive into the research topics of 'Aqueous phase semihydrogenation of alkynes over Ni-Fe bimetallic catalysts'. Together they form a unique fingerprint.

Cite this