Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 150, Issue -, Pages 57-62Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2013.11.036
Keywords
Artificial photosynthesis; Carbon dioxide photoreduction; TiO2 photocatalyst; Magnesium
Funding
- Carburos Metalicos
- Air Products group, as part of the CENIT SOST-CO2 project
- Ministerio de Economia y Competitividad-CDTI [CEN2008-1027]
- Ministerio de Economia y Competitividad [CSD2009-00050, MAT 2010-21510, ENE2012-3651]
- European Regional Development Funds (ERDF, FEDER Programa Competitivitat de Catalunya)
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Magnesium modified TiO2 photocatalyst has been found to improve the CO2 photoreduction reaction, with a high selectivity towards CH4. Thus, Mg-TiO2 has been synthesized with different compositions up to 2.0 wt%. Unlike the bare TiO2, the surface reorganization originated by the presence of Mg enhances the formation of methane by a factor of 4.5, corroborating that complete reduction of CO2 is achieved. It was found that the enhancement of the overall photocatalytic activity towards carbon dioxide reduction can be increased by a factor of 3, revealing a straightforward correlation with the surface states induced by the presence of the doping element. Finally, the evolution of the selectivity versus methane formation against hydrogen is discussed for the different magnesium loadings. (C) 2013 Elsevier B.V. All rights reserved.
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