Creating a Low-Potential Redox Polymer for Efficient Electroenzymatic CO2 Reduction

Mengwei Yuan; Selmihan Sahin; Rong Cai; Sofiene Abdellaoui; David P Hickey; Shelley D Minteer; Ross D Milton

doi:10.1002/anie.201803397

Creating a Low-Potential Redox Polymer for Efficient Electroenzymatic CO₂ Reduction

Angew Chem Int Ed Engl. 2018 May 28;57(22):6582-6586. doi: 10.1002/anie.201803397. Epub 2018 Apr 27.

Authors

Mengwei Yuan¹, Selmihan Sahin^{1

2}, Rong Cai¹, Sofiene Abdellaoui¹, David P Hickey¹, Shelley D Minteer¹, Ross D Milton^{1

3}

Affiliations

¹ Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, UT, 84112, USA.
² Department of Chemistry, Faculty of Arts and Sciences, Suleyman Demirel University, Cunur, Isparta, 32260, Turkey.
³ Current address: Department of Civil & Environmental Engineering, Stanford University, E-250 James H. Clark Center, 318 Campus Drive, Stanford, CA, 94305, USA.

PMID: 29656589
DOI: 10.1002/anie.201803397

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.

Keywords: carbon dioxide; cobaltocene; formate; formate dehydrogenase; redox polymers.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.