Cobalt-Doped Carbon Gels as Electro-Catalysts for the Reduction of CO2 to Hydrocarbons
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Abdelwahab, Abdalla; Castelo Quibén, Jesica; Perez-Cadenas, Maria; Elmouwahidi, Abdelhakim; Maldonado Hodar, Francisco José; Carrasco Marín, Francisco; Pérez Cadenas, Agustín FranciscoEditorial
MDPI
Materia
Carbon aerogels Carbon xerogels Cobalt
Date
2017-01-12Referencia bibliográfica
Abdelwahab, A.; Castelo-Quibén, J.; Pérez-Cadenas, M.; Elmouwahidi, A.; Maldonado-Hódar, F.J.; Carrasco-Marín, F.; Pérez-Cadenas, A.F. Cobalt-Doped Carbon Gels as Electro-Catalysts for the Reduction of CO2 to Hydrocarbons. Catalysts 2017, 7, 25. https://doi.org/10.3390/catal7010025
Sponsorship
European Regional Development Fund (FEDER); Spanish project CTQ2013-44789-R of Ministry of Industry, Economy and Competitiveness (MINECO); Spanish project P12-RNM-2892 of Junta de Andalucía; European Union for their Erasmus Mundus fellowships, Programs ELEMENT and Al Idrissi, respectively; Junta de Andalucía for her research contract (P12-RNM-2892)Abstract
Two original series of carbon gels doped with different cobalt loadings and well-developed
mesoporosity, aerogels and xerogels, have been prepared, exhaustively characterized, and tested
as cathodes for the electro-catalytic reduction of CO2 to hydrocarbons at atmospheric pressure.
Commercial cobalt and graphite sheets have also been tested as cathodes for comparison. All of
the doped carbon gels catalyzed the formation of hydrocarbons, at least from type C1 to C4.
The catalytic activity depends mainly on the metal loading, nevertheless, the adsorption of a part of
the products in the porous structure of the carbon gel cannot be ruled out. Apparent faradaic
efficiencies calculated with these developed materials were better that those obtained with
a commercial cobalt sheet as a cathode, especially considering the much lower amount of cobalt
contained in the Co-doped carbon gels. The cobalt-carbon phases formed in these types of doped
carbon gels improve the selectivity to C3-C4 hydrocarbons formation, obtaining even more C3
hydrocarbons than CH4 in some cases.