A generic model for photocatalytic activity as a function of catalyst thickness

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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A generic model for photocatalytic activity as a function of catalyst thickness. / Nielsen, Morten G.; In, Su-Il; Vesborg, Peter C.K.; Pedersen, Thomas; Almtoft, Klaus Pagh; Andersen, Inge; Hansen, Ole; Chorkendorff, Ib.

In: Journal of Catalysis, Vol. 289, 2012, p. 62-72.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Nielsen, Morten G.; In, Su-Il; Vesborg, Peter C.K.; Pedersen, Thomas; Almtoft, Klaus Pagh; Andersen, Inge; Hansen, Ole; Chorkendorff, Ib / A generic model for photocatalytic activity as a function of catalyst thickness.

In: Journal of Catalysis, Vol. 289, 2012, p. 62-72.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{b87b6d95c3174c26a833abdcfb54b5e1,
title = "A generic model for photocatalytic activity as a function of catalyst thickness",
publisher = "Academic Press",
author = "Nielsen, {Morten G.} and Su-Il In and Vesborg, {Peter C.K.} and Thomas Pedersen and Almtoft, {Klaus Pagh} and Inge Andersen and Ole Hansen and Ib Chorkendorff",
year = "2012",
doi = "10.1016/j.jcat.2012.01.015",
volume = "289",
pages = "62--72",
journal = "Journal of Catalysis",
issn = "0021-9517",

}

RIS

TY - JOUR

T1 - A generic model for photocatalytic activity as a function of catalyst thickness

A1 - Nielsen,Morten G.

A1 - In,Su-Il

A1 - Vesborg,Peter C.K.

A1 - Pedersen,Thomas

A1 - Almtoft,Klaus Pagh

A1 - Andersen,Inge

A1 - Hansen,Ole

A1 - Chorkendorff,Ib

AU - Nielsen,Morten G.

AU - In,Su-Il

AU - Vesborg,Peter C.K.

AU - Pedersen,Thomas

AU - Almtoft,Klaus Pagh

AU - Andersen,Inge

AU - Hansen,Ole

AU - Chorkendorff,Ib

PB - Academic Press

PY - 2012

Y1 - 2012

N2 - Photocatalytically active thin films of TiO2 on transparent supports display different activities depending on the direction of illumination in relation to the reactant gas. In the case, where illumination and reactant gas are both supplied from the same side, the activity goes toward an asymptotic value for increasing catalyst film thickness. Conversely, having opposing directions of illumination and incident gas, there exists an optimal catalyst film thickness with respect to activity. In the present work, we demonstrate, quantify and model this effect using methane photooxidation over PVD TiO2 thin films and derive analytical solutions to the gas diffusion/reaction system. The analytical model is fitted to the data to estimate relevant kinetic parameters such as gas diffusivity and reaction rate constants. The activity of samples is predicted quantitatively by the model, regardless of wavelength and intensity of illumination. The model serves as a general method to predict activities of photocatalytic films on transparent supports.

AB - Photocatalytically active thin films of TiO2 on transparent supports display different activities depending on the direction of illumination in relation to the reactant gas. In the case, where illumination and reactant gas are both supplied from the same side, the activity goes toward an asymptotic value for increasing catalyst film thickness. Conversely, having opposing directions of illumination and incident gas, there exists an optimal catalyst film thickness with respect to activity. In the present work, we demonstrate, quantify and model this effect using methane photooxidation over PVD TiO2 thin films and derive analytical solutions to the gas diffusion/reaction system. The analytical model is fitted to the data to estimate relevant kinetic parameters such as gas diffusivity and reaction rate constants. The activity of samples is predicted quantitatively by the model, regardless of wavelength and intensity of illumination. The model serves as a general method to predict activities of photocatalytic films on transparent supports.

KW - Photocatalysis

KW - Activity prediction

KW - Generic model

KW - TiO2

KW - Frontside and backside illumination

KW - Catalyst thickness

KW - μ-Reactor

U2 - 10.1016/j.jcat.2012.01.015

DO - 10.1016/j.jcat.2012.01.015

JO - Journal of Catalysis

JF - Journal of Catalysis

SN - 0021-9517

VL - 289

SP - 62

EP - 72

ER -