Continuous synthesis of formic acid and methyl formate via CO2 hydrogenation is demonstrated using a molecular iridium complex stably immobilized on a solid covalent triazine framework (CTF) under high-pressure conditions. Compared to formic acid synthesis, methyl formate synthesis is advantageous to enhance the selectivity and yield of formates under kinetically favorable high temperature conditions. Transient in situ vibrational spectroscopy shows that the CTF strongly interacts with CO2 and H2, and even activates methanol. Hence, CTF is a promising support for molecular catalysts, even under harsh supercritical and flow conditions, through its strong binding capability.
Bibliographical noteFunding Information:
This work was conducted in the framework of the Sinergia project (SNF project IZK0Z2_160957). J.J.C. and A.U. acknowledge Generalitat de Catalunya for financial support through the CERCA Programme and MINECO, Spain for financial support (CTQ2016-75499-R (FEDER-UE), SEV-2013-0319). A.B. thanks Obra Social ?la Caixa? for the ICIQ Summer Fellowship Programme.
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Copyright 2019 Elsevier B.V., All rights reserved.
- CO hydrogenation
- continuous synthesis
- covalent triazine framework
- formic acid
- heterogeneous catalysis