Jump to main content
Jump to site search


Electroreduction of CO2 to formate on amine modified Pb electrodes

Author affiliations

Abstract

The electrocatalytic activity of islands-like aryl-aliphatic amines, aminophenyl and nitrophenyl derived Pb surfaces toward the electroreduction of CO2 into formate was investigated. Diazonium chemistry was used to graft 4-aminomethylbenzene, 3-aminomethylbenzene, 4-(2-aminoethyl)benzene and nitrobenzene on the surface of Pb electrodes. Both scanning electron microscopy and X-ray photoelectron spectroscopy confirmed that organic layers are deposited at the surface of the electrodes, whose extent of grafting and thickness can be varied through the amine concentration in the grafting solution. The Pb-amine derived electrodes show enhanced activity and selectivity toward CO2 reduction to formate. Compared to bare Pb, the cyclic voltammograms of amine modified electrodes showed higher current density in CO2-saturated electrolyte and lower current density in Ar-saturated electrolyte. Stable electrolysis currents were recorded in most cases, and the best results were obtained for Pb modified with 4-aminomethylbenzene and a grafting extent of 6.3 × 10−7 mol cm−2. In that case, a current density as high as −24.0 mA cm−2 at −1.29 V vs. RHE was obtained, with a formate faradaic efficiency larger than 80%.

Graphical abstract: Electroreduction of CO2 to formate on amine modified Pb electrodes

Back to tab navigation

Supplementary files

Publication details

The article was received on 06 Oct 2018, accepted on 09 Apr 2019 and first published on 09 Apr 2019


Article type: Paper
DOI: 10.1039/C8TA09637F
Citation: J. Mater. Chem. A, 2019, Advance Article

  •   Request permissions

    Electroreduction of CO2 to formate on amine modified Pb electrodes

    N. Zouaoui, B. D. Ossonon, M. Fan, D. Mayilukila, S. Garbarino, G. de Silveira, G. A. Botton, D. Guay and A. C. Tavares, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C8TA09637F

Search articles by author

Spotlight

Advertisements