Active states of gold in small and big metal particles in CO and methanol selective oxidation

Abstract

(Graph Presented) Role of small and big gold particles in CO oxidation and methanol selective oxidation to formaldehyde has been studied by the methods of diffuse reflectance electron spectroscopy, XRD, XPS, HRTEM and catalytic testing. By comparison of catalytic and spectroscopic data it was concluded that states Au^δ+ with certain effective charge (δ < 1) are active sites in low-temperature CO oxidation as well as in alcohol partial oxidation. These states can be formed under the action of different factors, such as metal-support interaction, redox treatments, and modifying additives. Modifiers stabilizing the ionic states of gold (Ce and Zr oxides) increase the selectivity of the catalyst in alcohol partial oxidation, whereas electron-releasing additions (La and Cs oxides) impair the catalyst properties.

Original language	English
Pages (from-to)	48-53
Number of pages	6
Journal	Fuel
Volume	110
DOIs	https://doi.org/10.1016/j.fuel.2012.10.012
Publication status	Published - Aug 2013

Keywords

Active sites
CO oxidation
Gold catalysts
Methanol oxidation

ASJC Scopus subject areas

Fuel Technology
Energy Engineering and Power Technology
Chemical Engineering(all)
Organic Chemistry

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10.1016/j.fuel.2012.10.012

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Pestryakov, A. N., Lunin, V. V., Bogdanchikova, N., Temkin, O. N., & Smolentseva, E. (2013). Active states of gold in small and big metal particles in CO and methanol selective oxidation. Fuel, 110, 48-53. https://doi.org/10.1016/j.fuel.2012.10.012

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title = "Active states of gold in small and big metal particles in CO and methanol selective oxidation",

abstract = "(Graph Presented) Role of small and big gold particles in CO oxidation and methanol selective oxidation to formaldehyde has been studied by the methods of diffuse reflectance electron spectroscopy, XRD, XPS, HRTEM and catalytic testing. By comparison of catalytic and spectroscopic data it was concluded that states Auδ+ with certain effective charge (δ < 1) are active sites in low-temperature CO oxidation as well as in alcohol partial oxidation. These states can be formed under the action of different factors, such as metal-support interaction, redox treatments, and modifying additives. Modifiers stabilizing the ionic states of gold (Ce and Zr oxides) increase the selectivity of the catalyst in alcohol partial oxidation, whereas electron-releasing additions (La and Cs oxides) impair the catalyst properties.",

keywords = "Active sites, CO oxidation, Gold catalysts, Methanol oxidation",

author = "Pestryakov, {A. N.} and Lunin, {V. V.} and N. Bogdanchikova and Temkin, {O. N.} and E. Smolentseva",

year = "2013",

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doi = "10.1016/j.fuel.2012.10.012",

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T1 - Active states of gold in small and big metal particles in CO and methanol selective oxidation

AU - Pestryakov, A. N.

AU - Lunin, V. V.

AU - Bogdanchikova, N.

AU - Temkin, O. N.

AU - Smolentseva, E.

PY - 2013/8

Y1 - 2013/8

N2 - (Graph Presented) Role of small and big gold particles in CO oxidation and methanol selective oxidation to formaldehyde has been studied by the methods of diffuse reflectance electron spectroscopy, XRD, XPS, HRTEM and catalytic testing. By comparison of catalytic and spectroscopic data it was concluded that states Auδ+ with certain effective charge (δ < 1) are active sites in low-temperature CO oxidation as well as in alcohol partial oxidation. These states can be formed under the action of different factors, such as metal-support interaction, redox treatments, and modifying additives. Modifiers stabilizing the ionic states of gold (Ce and Zr oxides) increase the selectivity of the catalyst in alcohol partial oxidation, whereas electron-releasing additions (La and Cs oxides) impair the catalyst properties.

AB - (Graph Presented) Role of small and big gold particles in CO oxidation and methanol selective oxidation to formaldehyde has been studied by the methods of diffuse reflectance electron spectroscopy, XRD, XPS, HRTEM and catalytic testing. By comparison of catalytic and spectroscopic data it was concluded that states Auδ+ with certain effective charge (δ < 1) are active sites in low-temperature CO oxidation as well as in alcohol partial oxidation. These states can be formed under the action of different factors, such as metal-support interaction, redox treatments, and modifying additives. Modifiers stabilizing the ionic states of gold (Ce and Zr oxides) increase the selectivity of the catalyst in alcohol partial oxidation, whereas electron-releasing additions (La and Cs oxides) impair the catalyst properties.

KW - Active sites

KW - CO oxidation

KW - Gold catalysts

KW - Methanol oxidation

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