Engineering the TiO2 outermost layers using magnesium for carbon dioxide photoreduction

Marta Manzanares; Cristian Fàbrega; J. Oriol Ossó; Lourdes F. Vega; Teresa Andreu; Joan Ramón Morante

doi:10.1016/j.apcatb.2013.11.036

Engineering the TiO₂ outermost layers using magnesium for carbon dioxide photoreduction

Marta Manzanares, Cristian Fàbrega, J. Oriol Ossó, Lourdes F. Vega, Teresa Andreu, Joan Ramón Morante

Chemical and Petroleum Engineering

Research output: Contribution to journal › Article › peer-review

60 Scopus citations

Abstract

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 2.0wt%. 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.

Original language	British English
Pages (from-to)	57-62
Number of pages	6
Journal	Applied Catalysis B: Environmental
Volume	150-151
DOIs	https://doi.org/10.1016/j.apcatb.2013.11.036
State	Published - 5 May 2014

Keywords

Artificial photosynthesis
Carbon dioxide photoreduction
Magnesium

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.apcatb.2013.11.036

Cite this

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title = "Engineering the TiO2 outermost layers using magnesium for carbon dioxide photoreduction",

abstract = "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 2.0wt%. 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.",

keywords = "Artificial photosynthesis, Carbon dioxide photoreduction, Magnesium",

author = "Marta Manzanares and Cristian F{\`a}brega and {Oriol Oss{\'o}}, J. and Vega, {Lourdes F.} and Teresa Andreu and Morante, {Joan Ram{\'o}n}",

note = "Funding Information: We thank Dr. Ignasi Salvad{\'o} for his earlier contributions to this work. This work was supported by Carburos Met{\'a}licos, Air Products group , as part of the CENIT SOST-CO2 project, co-financed by Ministerio de Econom{\'i}a y Competitividad-CDTI CEN2008-1027 . Additional support from the Ministerio de Economia y Competitividad by projects CSD2009-00050, MAT 2010-21510, ENE2012-3651 and the European Regional Development Funds (ERDF , “FEDER Programa Competitivitat de Catalunya 2007–2013”) was also provided. ",

year = "2014",

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doi = "10.1016/j.apcatb.2013.11.036",

language = "British English",

volume = "150-151",

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journal = "Applied Catalysis B: Environmental",

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T1 - Engineering the TiO2 outermost layers using magnesium for carbon dioxide photoreduction

AU - Manzanares, Marta

AU - Fàbrega, Cristian

AU - Oriol Ossó, J.

AU - Vega, Lourdes F.

AU - Andreu, Teresa

AU - Morante, Joan Ramón

N1 - Funding Information: We thank Dr. Ignasi Salvadó for his earlier contributions to this work. This work was supported by Carburos Metálicos, Air Products group , as part of the CENIT SOST-CO2 project, co-financed by Ministerio de Economía y Competitividad-CDTI CEN2008-1027 . Additional support from the Ministerio de Economia y Competitividad by projects CSD2009-00050, MAT 2010-21510, ENE2012-3651 and the European Regional Development Funds (ERDF , “FEDER Programa Competitivitat de Catalunya 2007–2013”) was also provided.

PY - 2014/5/5

Y1 - 2014/5/5

N2 - 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 2.0wt%. 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.

AB - 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 2.0wt%. 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.

KW - Artificial photosynthesis

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