Creating a Low‐Potential Redox Polymer for Efficient Electroenzymatic CO2 Reduction. (27th April 2018)

• Record Type: Journal Article
• Authors: Yuan, Mengwei; Sahin, Selmihan; Cai, Rong; Abdellaoui, Sofiene; Hickey, David P.; Minteer, Shelley D.; Milton, Ross D.
• Is Part Of: Angewandte Chemie. Volume 130:Number 22(2018)
• Page Start: 6692
• Page End: 6696
• Publication Date: 2018-04-27
• Subjects: Cobaltocen -- Formiat -- Formiat-Dehydrogenasen -- Kohlendioxid -- Redoxpolymere; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201803397
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: 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. Abstract : Ein Redoxpolymer aus Cobaltocen und Polylallylamin ermöglicht Elektronentransfer zur Molybdän‐abhängigen Formiat‐Dehydrogenase (Mo‐FDH) aus Escherichia coli – einem Metalloenzym, das Formiat und CO2 ineinander überführt – und die Immobilisierung von Mo‐FDH an der Oberfläche einer Kohlenstoffelektrode. Diese Bioelektrode reduziert CO2 mit hohem Faraday‐Wirkungsgrad zu Formiat.