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. 2019 Oct 30;141(43):17081-17085.
doi: 10.1021/jacs.9b09298. Epub 2019 Oct 15.

Three-Dimensional Phthalocyanine Metal-Catecholates for High Electrochemical Carbon Dioxide Reduction

Roc Matheu  1 , Enrique Gutierrez-Puebla  2 , M Ángeles Monge  2 , Christian S Diercks  1 , Joohoon Kang  1 , Mathieu S Prévot  1 , Xiaokun Pei  1 , Nikita Hanikel  1 , Bing Zhang  1 , Peidong Yang  1 , Omar M Yaghi  1   3
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Free article

Three-Dimensional Phthalocyanine Metal-Catecholates for High Electrochemical Carbon Dioxide Reduction

Roc Matheu et al. J Am Chem Soc. .
Free article

Abstract

The synthesis of a new anionic 3D metal-catecholate framework, termed MOF-1992, is achieved by linking tetratopic cobalt phthalocyanin-2,3,9,10,16,17,23,24-octaol linkers with Fe3(-C2O2-)6(OH2)2 trimers into an extended framework of roc topology. MOF-1992 exhibits sterically accessible Co active sites together with charge transfer properties. Cathodes based on MOF-1992 and carbon black (CB) display a high coverage of electroactive sites (270 nmol cm-2) and a high current density (-16.5 mA cm-2; overpotential, -0.52 V) for the CO2 to CO reduction reaction in water (faradaic efficiency, 80%). Over the 6 h experiment, MOF-1992/CB cathodes reach turnover numbers of 5800 with turnover frequencies of 0.20 s-1 per active site.

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