ACS Catalysis
ACS Catalysis
4 years ago

A Bipyridine-Based Conjugated Microporous Polymer for the Ir-Catalyzed Dehydrogenation of Formic Acid

A Bipyridine-Based Conjugated Microporous Polymer for the Ir-Catalyzed Dehydrogenation of Formic Acid
Regina Palkovits, Severin R. Foit, Peter J.C. Hausoul, Cornelia Broicher, Marcus Rose
Formic acid is considered a promising energy storage medium, and its selective dehydrogenation enables the generation of high-purity H2. Herein we report a bipyridine-based conjugated microporous polymer (CMP) loaded with [Cp*IrCl2]2 for the base-free aqueous dehydrogenation of formic acid to H2/CO2. This catalyst exhibits high activity and selectivity at temperatures over 130 °C and with formic acid concentrations as high as 10 M. Recycling tests demonstrate a low Ir leaching and a gradual increase in the activity over six runs and a low CO content in the gas phase of about 138 ppm. TOFs of up to 123894 h–1 were obtained using 0.1 wt % Ir loading.

Publisher URL: http://dx.doi.org/10.1021/acscatal.7b02425

DOI: 10.1021/acscatal.7b02425

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