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Creating a Low-Potential Redox Polymer for Efficient Electroenzymatic CO 2 Reduction

Creating a Low-Potential Redox Polymer for Efficient Electroenzymatic CO 2 Reduction

Angewandte Chemie 57(22): 6582-6586

Increasing greenhouse gas emissions have resulted in greater motivation to find novel carbon dioxide (CO2 ) reduction technologies, where the reduction of CO2 to valuable chemical commodities is desirable. Molybdenum-dependent formate dehydrogenase (Mo-FDH) from Escherichia coli is a metalloenzyme that is able to interconvert formate and CO2 . We describe a low-potential redox polymer, synthesized by a facile method, that contains cobaltocene (grafted to poly(allylamine), Cc-PAA) to simultaneously mediate electrons to Mo-FDH and immobilize Mo-FDH at the surface of a carbon electrode. The resulting bioelectrode reduces CO2 to formate with a high Faradaic efficiency of 99±5 % at a mild applied potential of -0.66 V vs. SHE.

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Accession: 057217664

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PMID: 29656589

DOI: 10.1002/anie.201803397

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