Catalytically active gold clusters and nanoparticles for CO oxidation

A. N. Pestryakov, N. Bogdanchikova, A. Simakov, I. Tuzovskaya, F. Jentoft, M. Farias, A. Díaz

Research School of Chemistry & Applied Biomedical Sciences

Research output: Contribution to journal › Article

Abstract

Electronic states of gold nanoparticles in mordenite and their transformations under redox treatments have been studied by the methods of FTIR spectroscopy of adsorbed CO and diffuse reflectance UV-visible spectroscopy. 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 existence of two types of active sites of gold in CO oxidation - gold clusters <2 nm (low-temperature activity) and gold nanoparticles (high temperature activity).

Original language	English
Pages (from-to)	3792-3795
Number of pages	4
Journal	Surface Science
Volume	601
Issue number	18
DOIs	https://doi.org/10.1016/j.susc.2007.04.012
Publication status	Published - 15 Sep 2007

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Keywords

FTIR
Gold catalysts
Nanoparticles
UV-visible spectroscopy
Zeolites

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Condensed Matter Physics
Surfaces and Interfaces

Cite this

Pestryakov, A. N., Bogdanchikova, N., Simakov, A., Tuzovskaya, I., Jentoft, F., Farias, M., & Díaz, A. (2007). Catalytically active gold clusters and nanoparticles for CO oxidation. Surface Science, 601(18), 3792-3795. https://doi.org/10.1016/j.susc.2007.04.012

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AU - Pestryakov, A. N.

AU - Bogdanchikova, N.

AU - Simakov, A.

AU - Tuzovskaya, I.

AU - Jentoft, F.

AU - Farias, M.

AU - Díaz, A.

PY - 2007/9/15

Y1 - 2007/9/15

N2 - Electronic states of gold nanoparticles in mordenite and their transformations under redox treatments have been studied by the methods of FTIR spectroscopy of adsorbed CO and diffuse reflectance UV-visible spectroscopy. 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 existence of two types of active sites of gold in CO oxidation - gold clusters <2 nm (low-temperature activity) and gold nanoparticles (high temperature activity).

AB - Electronic states of gold nanoparticles in mordenite and their transformations under redox treatments have been studied by the methods of FTIR spectroscopy of adsorbed CO and diffuse reflectance UV-visible spectroscopy. 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 existence of two types of active sites of gold in CO oxidation - gold clusters <2 nm (low-temperature activity) and gold nanoparticles (high temperature activity).

KW - FTIR

KW - Gold catalysts

KW - Nanoparticles

KW - UV-visible spectroscopy

KW - Zeolites

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Access to Document

10.1016/j.susc.2007.04.012