Journal of Siberian Federal University. Chemistry / Electrochemical Reduction of Carbon Dioxide to Formate in Acetylene Black Gas Diffusion Electrode with a Lead Catalyst

Full text (.pdf)
Issue
Journal of Siberian Federal University. Chemistry. 2022 15 (4)
Authors
Kolyagin, Gennady A.; Kenova, Tatiana A.; Taran, Oxana P.
Contact information
Kolyagin, Gennady A.: Institute of Chemistry and Chemical Technology SB RA Federal Research Center “Krasnoyarsk Scientific Center of the SB RAS” Krasnoyarsk, Russian Federation; ; Kenova, Tatiana A.: Institute of Chemistry and Chemical Technology SB RA Federal Research Center “Krasnoyarsk Scientific Center of the SB RAS” Krasnoyarsk, Russian Federation; Taran, Oxana P.: Institute of Chemistry and Chemical Technology SB RA Federal Research Center “Krasnoyarsk Scientific Center of the SB RAS” Krasnoyarsk, Russian Federation
Keywords
carbon dioxide; formic acid; formate; electrocatalytic reduction; gas diffusion electrode; electrochemical impedance spectroscopy
Abstract

The influence of methods for fabrication of gas diffusion electrodes (GDE) based on A437E acetylene black on the electrochemical CO2 reduction formate was studied. A technique was developed for supporting a lead catalyst to carbon-graphite material. The electrochemical characteristics of the electrodes were studied by cyclic voltammetry, linear sweep voltammetry, electrochemical impedance spectroscopy and preparative potentiostatic electrolysis. The electrodes sintered under pressure was shown to have a more stable three-phase boundary, which prevents the electrodes from getting wet and, accordingly, improves the CO2 electroreduction process parameters. On these electrodes the potassium formate solutions with a concentration of up to 14 g/l at –1.9 V with 80–90 % current efficiency were produced

Pages
601–611
DOI
10.17516/1998-2836-0322
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/149791