Quantitative measurements of photocatalytic CO-oxidation as a function of light intensity and wavelength over TiO2 nanotube thin films in μ-reactors

Peter C.K. Vesborg; Su Il In; Jakob L. Olsen; Toke R. Henriksen; Billie L. Abrams; Yidong Hou; Alan Kleiman-Shwarsctein; Ole Hansen; Ib Chorkendorff

doi:10.1021/jp100552x

Quantitative measurements of photocatalytic CO-oxidation as a function of light intensity and wavelength over TiO₂ nanotube thin films in μ-reactors

Peter C.K. Vesborg, Su Il In, Jakob L. Olsen, Toke R. Henriksen, Billie L. Abrams, Yidong Hou, Alan Kleiman-Shwarsctein, Ole Hansen, Ib Chorkendorff

Department of Energy and Science and Engineering

Technical University of Denmark

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

25 Scopus citations

Abstract

Gas-phase photooxidation of CO over TiO₂ catalysts (P25 and TiO₂ nanotubes) in μ-reactors with quantitative product detection was used to study turnover as a function of illumination intensity over 4 orders of magnitude. Turnover was found to be of order 0.84 in illumination intensity. A CO photooxidation action spectrum was also recorded for TiO₂ nanotubes. The action spectrum was used to calculate both the incident photon to product efficiency (IPPE) and the absorbed photon to product efficiency (APPE). The wavelength dependence of the IPPE was found to follow the absorption spectrum while the APPE was found to have a peak around 345 nm with a value of about 0.8%.

Original language	English
Pages (from-to)	11162-11168
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	114
Issue number	25
DOIs	https://doi.org/10.1021/jp100552x
State	Published - 1 Jul 2010

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Vesborg, P. C. K., In, S. I., Olsen, J. L., Henriksen, T. R., Abrams, B. L., Hou, Y., Kleiman-Shwarsctein, A., Hansen, O., & Chorkendorff, I. (2010). Quantitative measurements of photocatalytic CO-oxidation as a function of light intensity and wavelength over TiO₂ nanotube thin films in μ-reactors. Journal of Physical Chemistry C, 114(25), 11162-11168. https://doi.org/10.1021/jp100552x

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title = "Quantitative measurements of photocatalytic CO-oxidation as a function of light intensity and wavelength over TiO2 nanotube thin films in μ-reactors",

abstract = "Gas-phase photooxidation of CO over TiO2 catalysts (P25 and TiO2 nanotubes) in μ-reactors with quantitative product detection was used to study turnover as a function of illumination intensity over 4 orders of magnitude. Turnover was found to be of order 0.84 in illumination intensity. A CO photooxidation action spectrum was also recorded for TiO2 nanotubes. The action spectrum was used to calculate both the incident photon to product efficiency (IPPE) and the absorbed photon to product efficiency (APPE). The wavelength dependence of the IPPE was found to follow the absorption spectrum while the APPE was found to have a peak around 345 nm with a value of about 0.8%.",

author = "Vesborg, {Peter C.K.} and In, {Su Il} and Olsen, {Jakob L.} and Henriksen, {Toke R.} and Abrams, {Billie L.} and Yidong Hou and Alan Kleiman-Shwarsctein and Ole Hansen and Ib Chorkendorff",

year = "2010",

month = jul,

day = "1",

doi = "10.1021/jp100552x",

language = "English",

volume = "114",

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journal = "Journal of Physical Chemistry C",

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publisher = "American Chemical Society",

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Vesborg, PCK, In, SI, Olsen, JL, Henriksen, TR, Abrams, BL, Hou, Y, Kleiman-Shwarsctein, A, Hansen, O & Chorkendorff, I 2010, 'Quantitative measurements of photocatalytic CO-oxidation as a function of light intensity and wavelength over TiO₂ nanotube thin films in μ-reactors', Journal of Physical Chemistry C, vol. 114, no. 25, pp. 11162-11168. https://doi.org/10.1021/jp100552x

TY - JOUR

T1 - Quantitative measurements of photocatalytic CO-oxidation as a function of light intensity and wavelength over TiO2 nanotube thin films in μ-reactors

AU - Vesborg, Peter C.K.

AU - In, Su Il

AU - Olsen, Jakob L.

AU - Henriksen, Toke R.

AU - Abrams, Billie L.

AU - Hou, Yidong

AU - Kleiman-Shwarsctein, Alan

AU - Hansen, Ole

AU - Chorkendorff, Ib

PY - 2010/7/1

Y1 - 2010/7/1

N2 - Gas-phase photooxidation of CO over TiO2 catalysts (P25 and TiO2 nanotubes) in μ-reactors with quantitative product detection was used to study turnover as a function of illumination intensity over 4 orders of magnitude. Turnover was found to be of order 0.84 in illumination intensity. A CO photooxidation action spectrum was also recorded for TiO2 nanotubes. The action spectrum was used to calculate both the incident photon to product efficiency (IPPE) and the absorbed photon to product efficiency (APPE). The wavelength dependence of the IPPE was found to follow the absorption spectrum while the APPE was found to have a peak around 345 nm with a value of about 0.8%.

AB - Gas-phase photooxidation of CO over TiO2 catalysts (P25 and TiO2 nanotubes) in μ-reactors with quantitative product detection was used to study turnover as a function of illumination intensity over 4 orders of magnitude. Turnover was found to be of order 0.84 in illumination intensity. A CO photooxidation action spectrum was also recorded for TiO2 nanotubes. The action spectrum was used to calculate both the incident photon to product efficiency (IPPE) and the absorbed photon to product efficiency (APPE). The wavelength dependence of the IPPE was found to follow the absorption spectrum while the APPE was found to have a peak around 345 nm with a value of about 0.8%.

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U2 - 10.1021/jp100552x

DO - 10.1021/jp100552x

M3 - Article

AN - SCOPUS:77954082322

SN - 1932-7447

VL - 114

SP - 11162

EP - 11168

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 25

ER -

Quantitative measurements of photocatalytic CO-oxidation as a function of light intensity and wavelength over TiO₂ nanotube thin films in μ-reactors

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