期刊
CHEMSUSCHEM
卷 10, 期 6, 页码 1071-1075出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201601437
关键词
CO2 hydrogenation; H-2 storage; homogeneous catalysis; imidazoline; iridium complex
资金
- Japan Science and Technology Agency (JST)
- ACT-C
- U.S. Department of Energy, Office of Science, Division of Chemical Sciences, Geosciences, & Biosciences, Office of Basic Energy Sciences [DE-SC00112704]
A series of new imidazoline-based iridium complexes has been developed for hydrogenation of CO2 and dehydrogenation of formic acid. One of the proton-responsive complexes bearing two-OH groups at ortho and para positions on a coordinating pyridine ring (3b) can catalyze efficiently the chemical fixation of CO2 and release H-2 under mild conditions in aqueous media without using organic additives/solvents. Notably, hydrogenation of CO2 can be efficiently carried out under CO2 and H-2 at atmospheric pressure in basic water by 3b, achieving a turnover frequency of 106 h(-1) and a turnover number of 7280 at 258 degrees C, which are higher than ever reported. Moreover, highly efficient CO-free hydrogen production from formic acid in aqueous solution employing the same catalyst under mild conditions has been achieved, thus providing a promising potential H-2-storage system in water.
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