Oxidation of methane on nanoparticulate Au/TiO2 at low temperature: A combined microreactor and DFT study

Guido Walther; Glenn Jones; Søren Jensen; Ulrich Quaade; Sebastian Horch

doi:10.1016/j.cattod.2009.01.007

Oxidation of methane on nanoparticulate Au/TiO2 at low temperature: A combined microreactor and DFT study

Guido Walther, Glenn Jones, Søren Jensen, Ulrich Quaade, Sebastian Horch

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Herein we present results from experimental and theoretical studies concerning low temperature oxidation of CH4 over TiO2 supported Au nanoparticles. Our findings suggest that partial oxidation cannot be achieved under these conditions (1 bar, 30–250 °C). In order to understand this further, results from CO and H2 oxidation studies are also presented. The reaction rate for CH4 oxidation is found to be far lower than the rate for both CO and H2 oxidation, this goes towards explaining the strong tendency for total CH4 oxidation. These findings are further corroborated by DFT-calculations investigating the thermodynamics of CH4 oxidation on a stepped Au(2 1 1) surface. Keywords: Gold; Titanium dioxide; Catalysis; Microreactor; Methane; Oxidation; Particle size

Original language	English
Journal	Catalysis Today
Volume	142
Issue number	1-2
Pages (from-to)	24-29
ISSN	0920-5861
DOIs	https://doi.org/10.1016/j.cattod.2009.01.007
Publication status	Published - 2009

Keywords

Particle size
Methane
Titanium dioxide
Oxidation
Microreactor
Gold
Catalysis

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title = "Oxidation of methane on nanoparticulate Au/TiO2 at low temperature: A combined microreactor and DFT study",

abstract = "Herein we present results from experimental and theoretical studies concerning low temperature oxidation of CH4 over TiO2 supported Au nanoparticles. Our findings suggest that partial oxidation cannot be achieved under these conditions (1 bar, 30–250 °C). In order to understand this further, results from CO and H2 oxidation studies are also presented. The reaction rate for CH4 oxidation is found to be far lower than the rate for both CO and H2 oxidation, this goes towards explaining the strong tendency for total CH4 oxidation. These findings are further corroborated by DFT-calculations investigating the thermodynamics of CH4 oxidation on a stepped Au(2 1 1) surface. Keywords: Gold; Titanium dioxide; Catalysis; Microreactor; Methane; Oxidation; Particle size",

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T1 - Oxidation of methane on nanoparticulate Au/TiO2 at low temperature: A combined microreactor and DFT study

AU - Walther, Guido

AU - Jones, Glenn

AU - Jensen, Søren

AU - Quaade, Ulrich

AU - Horch, Sebastian

PY - 2009

Y1 - 2009

N2 - Herein we present results from experimental and theoretical studies concerning low temperature oxidation of CH4 over TiO2 supported Au nanoparticles. Our findings suggest that partial oxidation cannot be achieved under these conditions (1 bar, 30–250 °C). In order to understand this further, results from CO and H2 oxidation studies are also presented. The reaction rate for CH4 oxidation is found to be far lower than the rate for both CO and H2 oxidation, this goes towards explaining the strong tendency for total CH4 oxidation. These findings are further corroborated by DFT-calculations investigating the thermodynamics of CH4 oxidation on a stepped Au(2 1 1) surface. Keywords: Gold; Titanium dioxide; Catalysis; Microreactor; Methane; Oxidation; Particle size

AB - Herein we present results from experimental and theoretical studies concerning low temperature oxidation of CH4 over TiO2 supported Au nanoparticles. Our findings suggest that partial oxidation cannot be achieved under these conditions (1 bar, 30–250 °C). In order to understand this further, results from CO and H2 oxidation studies are also presented. The reaction rate for CH4 oxidation is found to be far lower than the rate for both CO and H2 oxidation, this goes towards explaining the strong tendency for total CH4 oxidation. These findings are further corroborated by DFT-calculations investigating the thermodynamics of CH4 oxidation on a stepped Au(2 1 1) surface. Keywords: Gold; Titanium dioxide; Catalysis; Microreactor; Methane; Oxidation; Particle size

KW - Particle size

KW - Methane

KW - Titanium dioxide

KW - Oxidation

KW - Microreactor

KW - Gold

KW - Catalysis

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DO - 10.1016/j.cattod.2009.01.007

M3 - Journal article

SN - 0920-5861

VL - 142

SP - 24

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JO - Catalysis Today

JF - Catalysis Today

IS - 1-2

ER -

Oxidation of methane on nanoparticulate Au/TiO2 at low temperature: A combined microreactor and DFT study

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