Highly Efficient Iridium‐Catalyzed Production of Hydrogen and Lactate from Glycerol: Rapid Hydrogen Evolution by Bimetallic Iridium Catalysts

Mono‐ and bimetallic iridium complexes involving novel triscarbene ligands were synthesized and applied to the dehydrogenation of biomass‐derived glycerol. This resulted in affording hydrogen and lactate with the excellent turnover number (TON; 3,240,000) and turnover frequency (TOF; 162,000 h–1). T...

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Bibliographic Details
Published in:European journal of inorganic chemistry 2020-11, Vol.2020 (43), p.4064-4068
Main Authors: Cheong, Yeon‐Joo, Sung, Kihyuk, Kim, Jin‐A, Kim, Yu Kwon, Jang, Hye‐Young
Format: Article
Language:English
Subjects:
Bimetals
Carbene ligands
Coordination compounds
Dehydrogenation
Glycerol
Homogeneous catalysis
Hydrogen
Hydrogen evolution
Hydrogen production
Inorganic chemistry
Iridium
Iridium compounds
Lactate
Ligands
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Summary:Mono‐ and bimetallic iridium complexes involving novel triscarbene ligands were synthesized and applied to the dehydrogenation of biomass‐derived glycerol. This resulted in affording hydrogen and lactate with the excellent turnover number (TON; 3,240,000) and turnover frequency (TOF; 162,000 h–1). The triscarbene ligand in a single frame allowed the formation of bimetallic iridium complexes. This induced the cooperative effect of two iridium ions and rendered excellent TONs and TOFs in the production of hydrogen and lactate. Highly efficient iridium catalysts modified with triscarbene ligands showed excellent TONs and TOFs for hydrogen generation from glycerol. The initial rate of hydrogen generation by bimetallic iridium catalysts was much faster than monometallic catalysts.
ISSN:1434-1948
1099-0682
DOI:10.1002/ejic.202000670