Effect of Au surface plasmon nanoparticles on the selective CO2 photoreduction to CH4

L. Collado; A. Reynal; J. M. Coronado; D. P. Serrano; J. R. Durrant; V. A. De la Peña O'Shea

doi:10.1016/j.apcatb.2014.09.032

Effect of Au surface plasmon nanoparticles on the selective CO₂ photoreduction to CH₄

L. Collado, A. Reynal, J. M. Coronado, D. P. Serrano, J. R. Durrant, V. A. De la Peña O'Shea

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

26 Citations (Scopus)

Abstract

Various gold-supported TiO₂ catalysts (0.5-3.0 wt.%) were prepared by a deposition-precipitation method, and their photocatalytic activity towards CO₂ reduction was tested in the gas phase while using H₂O as electron donor and UV and visible light as energy sources. CO and H₂ are detected as major products in bare TiO₂. However, the deposition of small Au nanoparticles (NPs) onto TiO₂ was found to quantitatively enhance the reduction of CO₂ mainly to methane and C₂₊ hydrocarbons. Transient absorption spectroscopy was used to correlate the improved CH₄ production with an increased charge separation due to the electron transfer between the TiO₂ and Au NPs. The amount of Au loaded onto TiO₂ was optimized, with 1.0 wt.% showing the highest photocatalytic activity under UV light. Under visible irradiation, H₂ and CH₄ were identified as the main products, although showing significantly lower productions.

Original language	English
Pages (from-to)	177-185
Number of pages	9
Journal	Applied Catalysis B: Environmental
Volume	178
DOIs	https://doi.org/10.1016/j.apcatb.2014.09.032
Publication status	Published - 29 Jul 2015

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title = "Effect of Au surface plasmon nanoparticles on the selective CO2 photoreduction to CH4",

abstract = "Various gold-supported TiO2 catalysts (0.5-3.0 wt.%) were prepared by a deposition-precipitation method, and their photocatalytic activity towards CO2 reduction was tested in the gas phase while using H2O as electron donor and UV and visible light as energy sources. CO and H2 are detected as major products in bare TiO2. However, the deposition of small Au nanoparticles (NPs) onto TiO2 was found to quantitatively enhance the reduction of CO2 mainly to methane and C2+ hydrocarbons. Transient absorption spectroscopy was used to correlate the improved CH4 production with an increased charge separation due to the electron transfer between the TiO2 and Au NPs. The amount of Au loaded onto TiO2 was optimized, with 1.0 wt.% showing the highest photocatalytic activity under UV light. Under visible irradiation, H2 and CH4 were identified as the main products, although showing significantly lower productions.",

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AU - Collado, L.

AU - Reynal, A.

AU - Coronado, J. M.

AU - Serrano, D. P.

AU - Durrant, J. R.

AU - De la Peña O'Shea, V. A.

PY - 2015/7/29

Y1 - 2015/7/29

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Effect of Au surface plasmon nanoparticles on the selective CO₂ photoreduction to CH₄

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