Gas-liquid-solid reaction system for CO2 electroreduction to formate without using supporting electrolyte

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URI: http://hdl.handle.net/10902/19205
ISSN: 0001-1541
ISSN: 1547-5905
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Autoría
Díaz Sainz, GuillermoAutoridad Unican; Álvarez Guerra, ManuelAutoridad Unican; Solla Gullón, José; García Cruz, Leticia; Montiel Leguey, Vicente; Irabien Gulías, ÁngelAutoridad Unican
Fecha
2020-09
Derechos
© American Institute of Chemical Engineers. Published by Wiley. This is the peer reviewed version of the following article: Díaz-Sainz, G, Alvarez-Guerra, M, Solla-Gullón, J, García-Cruz, L, Montiel, V, Irabien, A. Gas-liquid-solid reaction system for CO2 electroreduction to formate without using supporting electrolyte. AIChE J. 2020; 66:e16299, which has been published in final form at https://doi.org/10.1002/aic.16299. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Publicado en
AIChE Journal, 2020, 66(9), e16299
Editorial
American Institute of Chemical Engineers
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Palabras clave
Bismuth
CCMEs
CO2 electroreduction
Formate
G–L–S reaction system
Resumen/Abstract
The use of bismuth-based catalysts is promising for formate production by the electroreduction of CO2 captured from waste streams. However, compared to the extensive research on catalysts, only a few studies have focused on electrochemical reactor performance. Hence, this work studied a continuous-mode gas-liquid-solid reaction system for investigating CO2 electroreduction to formate using Bi-catalyst-coated membrane electrodes as cathodes. The experimental setup was designed to analyze products obtained in both liquid and gas phases. The influence of relevant variables (e.g., temperature and input water flow) was analyzed, with the thickness of the liquid film formed over the cathode surface being a key parameter affecting system performance. Promising results, including a high formate concentration of 34 g/L with faradaic efficiency for formate of 72%, were achieved.
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