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Title: Highly active Au/d-MoC and Cu/d-MoC catalysts for the conversion of CO2: The metal/C ratio as a key factor defining activity, selectivity and stability
Author: Posada-Perez, Sergio
Ramírez, P. J.
Evans, Jaime
Viñes Solana, Francesc
Liu, P.
Illas i Riera, Francesc
Rodríguez, J. A.
Keywords: Reducció de gasos d'efecte hivernacle
Greenhouse gas mitigation
Issue Date: 16-Jun-2016
Publisher: American Chemical Society
Abstract: The ever growing increase of CO2 concentration in the atmosphere is one of the main causes of global warming. Thus, CO2 activation and conversion towards valuable added compounds is a major scientific challenge. A new set of Au/δ-MoC and Cu/δ-MoC catalysts exhibits high activity, selectivity, and stability for the reduction of CO2 to CO with some subsequent selective hydrogenation towards methanol. Sophisticated experiments under controlled conditions and calculations based on density functional theory have been used to study the unique behavior of these systems. A detailed comparison of the behavior of Au/β-Mo2C and Au/δ-MoC catalysts provides evidence of the impact of the metal/carbon ratio in the carbide on the performance of the catalysts. The present results show that this ratio governs the chemical behavior of the carbide and the properties of the admetal, up to the point of being able to switch the rate and mechanism of the process for CO2 conversion. A control of the metal/carbon ratio paves the road for an efficient reutilization of this environmental harmful greenhouse gas.
Note: Versió postprint del document publicat a:
It is part of: Journal of the American Chemical Society, 2016, vol. 138, num. 26, p. 8269-8278
ISSN: 0002-7863
Appears in Collections:Publicacions de projectes de recerca finançats per la UE
Articles publicats en revistes (Ciència dels Materials i Química Física)

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