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Heterogeneous Formic Acid Production by Hydrogenation of CO 2 Catalyzed by Ir‐bpy Embedded in Polyphenylene Porous Organic Polymers
Author(s) -
Bennedsen Niklas R.,
Christensen David B.,
Mortensen Rasmus L.,
Wang Bolun,
Wang Ryan,
Kramer Søren,
Kegnæs Søren
Publication year - 2021
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.202100002
Subject(s) - catalysis , formic acid , formate , physisorption , heterogeneous catalysis , x ray photoelectron spectroscopy , porosity , polymer , chemistry , homogeneous catalysis , methyl formate , chemical engineering , decomposition , selectivity , materials science , organic chemistry , engineering
Abstract Heterogeneous immobilized molecular catalysis has gained significant attention as a platform for creating more efficient and selective catalysts. A promising type of immobilized molecular catalysts are made from porous organic polymers (POPs) due to their high stability, porosity, and ability to mimic the catalytic activity and selectivity of homogeneous organometallic catalysts. These properties of the POP‐based systems make them very attractive as heterogeneous catalysts for hydrogenation of CO 2 to formate, where predominately homogeneous systems have been applied. In this study, five POPs were synthesized and assessed in the hydrogenation of CO 2 where the active catalysts were made in‐situ by mixing IrCl 3 and the POPs. One of the Ir/POP catalysts provided a turn‐over number (TON) >20,000, which is among the highest for POP‐based systems. Thorough characterization (CO 2 ‐ and N 2 ‐physisorption, TGA, CHN‐analysis, XRD, XPS, SEM, STEM and TEM) was performed. Notably, the developed Ir/POP system also showed catalytic activity for the decomposition of formic acid into H 2 enabling the use of formic acid as a renewable energy carrier.