Issue 23, 2018

Iridium–NHC-based catalyst for ambient pressure storage and low temperature release of H2via the CO2/HCO2H couple

Abstract

A hybrid N-heterocyclic carbene (NHC) ligand-based iridium catalyst system has been demonstrated in ambient-pressure CO2-hydrogenation and low-temperature HCO2H-dehydrogenation processes. High catalytic activity with TOF values of up to 58 h−1 at 30 °C and 1 atm pressure for hydrogenation and up to 100 000 h−1 at 90 °C for dehydrogenation has been achieved with this promising catalyst. The newly-introduced strategy of using an imidazolylidene-based strongly sigma-donating abnormal NHC ligand partnering with a proton-responsive ligand framework within the catalyst suggested a key guideline in this chemistry involving dual activity toward chemical hydrogen storage/delivery processes.

Graphical abstract: Iridium–NHC-based catalyst for ambient pressure storage and low temperature release of H2via the CO2/HCO2H couple

Supplementary files

Article information

Article type
Paper
Submitted
06 Oct 2018
Accepted
16 Oct 2018
First published
18 Oct 2018

Catal. Sci. Technol., 2018,8, 6137-6142

Iridium–NHC-based catalyst for ambient pressure storage and low temperature release of H2via the CO2/HCO2H couple

S. Semwal, A. Kumar and J. Choudhury, Catal. Sci. Technol., 2018, 8, 6137 DOI: 10.1039/C8CY02069H

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