Co-existance of various active gold species in Au-mordenite catalyst for CO oxidation

Abstract

Different structural and electronic states of gold species in H-mordenite with SiO₂/Al₂O₃ molar ratio 206 and their transformations under redox treatments have been studied by the methods of diffuse reflectance UV-visible spectroscopy and FTIR spectroscopy of adsorbed CO. Different states of ionic and metallic gold were detected in the zeolite channels and on the external surface of the zeolite - Au⁺ and Au³⁺ ions, charged clusters Au_n^{δ +}, and neutral nanoparticles Au_m. Catalytic tests of the samples revealed the co-existence of several types of active species of gold in CO oxidation - gold clusters <1.5 nm (responsible for low-temperature activity) and gold nanoparticles (responsible for high-temperature activity).

Original language	English
Pages (from-to)	977-980
Number of pages	4
Journal	Catalysis Communications
Volume	8
Issue number	7
DOIs	https://doi.org/10.1016/j.catcom.2006.10.014
Publication status	Published - Jul 2007

Keywords

Active sites
Catalyst
Gold
Oxidation
Zeolite

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology

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10.1016/j.catcom.2006.10.014

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Tuzovskaya, I. V., Simakov, A. V., Pestryakov, A. N., Bogdanchikova, N. E., Gurin, V. V., Farías, M. H., Tiznado, H. J., & Avalos, M. (2007). Co-existance of various active gold species in Au-mordenite catalyst for CO oxidation. Catalysis Communications, 8(7), 977-980. https://doi.org/10.1016/j.catcom.2006.10.014

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title = "Co-existance of various active gold species in Au-mordenite catalyst for CO oxidation",

abstract = "Different structural and electronic states of gold species in H-mordenite with SiO2/Al2O3 molar ratio 206 and their transformations under redox treatments have been studied by the methods of diffuse reflectance UV-visible spectroscopy and FTIR spectroscopy of adsorbed CO. Different states of ionic and metallic gold were detected in the zeolite channels and on the external surface of the zeolite - Au+ and Au3+ ions, charged clusters Aunδ +, and neutral nanoparticles Aum. Catalytic tests of the samples revealed the co-existence of several types of active species of gold in CO oxidation - gold clusters <1.5 nm (responsible for low-temperature activity) and gold nanoparticles (responsible for high-temperature activity).",

keywords = "Active sites, Catalyst, Gold, Oxidation, Zeolite",

author = "Tuzovskaya, {I. V.} and Simakov, {A. V.} and Pestryakov, {A. N.} and Bogdanchikova, {N. E.} and Gurin, {V. V.} and Far{\'i}as, {M. H.} and Tiznado, {H. J.} and M. Avalos",

year = "2007",

month = jul,

doi = "10.1016/j.catcom.2006.10.014",

language = "English",

volume = "8",

pages = "977--980",

journal = "Catalysis Communications",

issn = "1566-7367",

publisher = "Elsevier",

number = "7",

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TY - JOUR

T1 - Co-existance of various active gold species in Au-mordenite catalyst for CO oxidation

AU - Tuzovskaya, I. V.

AU - Simakov, A. V.

AU - Pestryakov, A. N.

AU - Bogdanchikova, N. E.

AU - Gurin, V. V.

AU - Farías, M. H.

AU - Tiznado, H. J.

AU - Avalos, M.

PY - 2007/7

Y1 - 2007/7

N2 - Different structural and electronic states of gold species in H-mordenite with SiO2/Al2O3 molar ratio 206 and their transformations under redox treatments have been studied by the methods of diffuse reflectance UV-visible spectroscopy and FTIR spectroscopy of adsorbed CO. Different states of ionic and metallic gold were detected in the zeolite channels and on the external surface of the zeolite - Au+ and Au3+ ions, charged clusters Aunδ +, and neutral nanoparticles Aum. Catalytic tests of the samples revealed the co-existence of several types of active species of gold in CO oxidation - gold clusters <1.5 nm (responsible for low-temperature activity) and gold nanoparticles (responsible for high-temperature activity).

AB - Different structural and electronic states of gold species in H-mordenite with SiO2/Al2O3 molar ratio 206 and their transformations under redox treatments have been studied by the methods of diffuse reflectance UV-visible spectroscopy and FTIR spectroscopy of adsorbed CO. Different states of ionic and metallic gold were detected in the zeolite channels and on the external surface of the zeolite - Au+ and Au3+ ions, charged clusters Aunδ +, and neutral nanoparticles Aum. Catalytic tests of the samples revealed the co-existence of several types of active species of gold in CO oxidation - gold clusters <1.5 nm (responsible for low-temperature activity) and gold nanoparticles (responsible for high-temperature activity).

KW - Active sites

KW - Catalyst

KW - Gold

KW - Oxidation

KW - Zeolite

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