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