Efficient Hydrogen Storage and Production Using a Catalyst with an Imidazoline-Based, Proton-Responsive Ligand

Lin Wang, Naoya Onishi, Kazuhisa Murata, Takuji Hirose, James Muckerman, Etsuko Fujita, Yuichiro Himeda

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

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 (3 b) can catalyze efficiently the chemical fixation of CO2 and release H2 under mild conditions in aqueous media without using organic additives/solvents. Notably, hydrogenation of CO2 can be efficiently carried out under CO2 and H2 at atmospheric pressure in basic water by 3 b, achieving a turnover frequency of 106 h−1 and a turnover number of 7280 at 25 °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 H2-storage system in water.

Original languageEnglish
Pages (from-to)1071-1075
Number of pages5
JournalChemSusChem
Volume10
Issue number6
DOIs
Publication statusPublished - Mar 22 2017

Fingerprint

formic acid
Imidazolines
Formic acid
Hydrogen storage
Hydrogen production
ligand
Hydrogenation
Protons
turnover
Bearings (structural)
catalyst
Ligands
hydrogen
Iridium
iridium
Catalysts
Water
Dehydrogenation
Carbon Monoxide
Pyridine

Keywords

  • CO hydrogenation
  • H storage
  • homogeneous catalysis
  • imidazoline
  • iridium complex

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

Cite this

Efficient Hydrogen Storage and Production Using a Catalyst with an Imidazoline-Based, Proton-Responsive Ligand. / Wang, Lin; Onishi, Naoya; Murata, Kazuhisa; Hirose, Takuji; Muckerman, James; Fujita, Etsuko; Himeda, Yuichiro.

In: ChemSusChem, Vol. 10, No. 6, 22.03.2017, p. 1071-1075.

Research output: Contribution to journalArticle

Wang, Lin ; Onishi, Naoya ; Murata, Kazuhisa ; Hirose, Takuji ; Muckerman, James ; Fujita, Etsuko ; Himeda, Yuichiro. / Efficient Hydrogen Storage and Production Using a Catalyst with an Imidazoline-Based, Proton-Responsive Ligand. In: ChemSusChem. 2017 ; Vol. 10, No. 6. pp. 1071-1075.
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