Study of electronic state of supported gold nanospecies by IR spectroscopy

Abstract

The nature of different Au species supported on hexagonal mesoporous silica has been studied by infrared spectroscopy of adsorbed CO. Experiments revealed existence of the following states of supported gold: neutral metal particles Au°, ions Au⁺ and a number of partly charged states Au ^δ+ with different effective charge. Redox pretreatments (vacuum, O₂ and H₂) of Au/SiO₂ at the different temperatures (100, 300 and 500°C) exert a significant effect on the electronic state of supported Au species. The experiments showed high stability of Au^δ+ states under all treatments; that may prove their active role in catalytic properties of gold.

Original language	English
Title of host publication	Proceedings - 2012 7th International Forum on Strategic Technology, IFOST 2012
DOIs	https://doi.org/10.1109/IFOST.2012.6357581
Publication status	Published - 2012
Event	2012 7th International Forum on Strategic Technology, IFOST 2012 - Tomsk, Russian Federation Duration: 18 Sep 2012 → 21 Sep 2012

Other

Other	2012 7th International Forum on Strategic Technology, IFOST 2012
Country	Russian Federation
City	Tomsk
Period	18.9.12 → 21.9.12

Keywords

CO adsorbtion
gold catalyst
mesoporous silica
redox pretreatments

ASJC Scopus subject areas

Management of Technology and Innovation

Access to Document

10.1109/IFOST.2012.6357581

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Cite this

Martynyuk, OA , Pestryakov, A, Bogdanchikova, N, Tiznado, H, Zepeda, TA & Tuzovskaya, I 2012, Study of electronic state of supported gold nanospecies by IR spectroscopy. in Proceedings - 2012 7th International Forum on Strategic Technology, IFOST 2012., 6357581, 2012 7th International Forum on Strategic Technology, IFOST 2012, Tomsk, Russian Federation, 18.9.12. https://doi.org/10.1109/IFOST.2012.6357581

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title = "Study of electronic state of supported gold nanospecies by IR spectroscopy",

abstract = "The nature of different Au species supported on hexagonal mesoporous silica has been studied by infrared spectroscopy of adsorbed CO. Experiments revealed existence of the following states of supported gold: neutral metal particles Au°, ions Au+ and a number of partly charged states Au δ+ with different effective charge. Redox pretreatments (vacuum, O2 and H2) of Au/SiO2 at the different temperatures (100, 300 and 500°C) exert a significant effect on the electronic state of supported Au species. The experiments showed high stability of Auδ+ states under all treatments; that may prove their active role in catalytic properties of gold.",

keywords = "CO adsorbtion, gold catalyst, mesoporous silica, redox pretreatments",

author = "Martynyuk, {Oxana Anatolievna} and A. Pestryakov and N. Bogdanchikova and H. Tiznado and Zepeda, {T. A.} and I. Tuzovskaya",

year = "2012",

doi = "10.1109/IFOST.2012.6357581",

language = "English",

isbn = "9781467317702",

booktitle = "Proceedings - 2012 7th International Forum on Strategic Technology, IFOST 2012",

note = "2012 7th International Forum on Strategic Technology, IFOST 2012 ; Conference date: 18-09-2012 Through 21-09-2012",

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T1 - Study of electronic state of supported gold nanospecies by IR spectroscopy

AU - Martynyuk, Oxana Anatolievna

AU - Pestryakov, A.

AU - Bogdanchikova, N.

AU - Tiznado, H.

AU - Zepeda, T. A.

AU - Tuzovskaya, I.

PY - 2012

Y1 - 2012

N2 - The nature of different Au species supported on hexagonal mesoporous silica has been studied by infrared spectroscopy of adsorbed CO. Experiments revealed existence of the following states of supported gold: neutral metal particles Au°, ions Au+ and a number of partly charged states Au δ+ with different effective charge. Redox pretreatments (vacuum, O2 and H2) of Au/SiO2 at the different temperatures (100, 300 and 500°C) exert a significant effect on the electronic state of supported Au species. The experiments showed high stability of Auδ+ states under all treatments; that may prove their active role in catalytic properties of gold.

AB - The nature of different Au species supported on hexagonal mesoporous silica has been studied by infrared spectroscopy of adsorbed CO. Experiments revealed existence of the following states of supported gold: neutral metal particles Au°, ions Au+ and a number of partly charged states Au δ+ with different effective charge. Redox pretreatments (vacuum, O2 and H2) of Au/SiO2 at the different temperatures (100, 300 and 500°C) exert a significant effect on the electronic state of supported Au species. The experiments showed high stability of Auδ+ states under all treatments; that may prove their active role in catalytic properties of gold.

KW - CO adsorbtion

KW - gold catalyst

KW - mesoporous silica

KW - redox pretreatments

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