Catalytically active gold clusters and nanoparticles for CO oxidation

Pestryakov, Alexey N.; Bogdanchikova, Nina; Simakov, Andrey; Tuzovskaya, Inga; Jentoft, Friederike C.; Farias, Mario; Díaz, Antonio

doi:10.1016/j.susc.2007.04.012

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Catalytically active gold clusters and nanoparticles for CO oxidation

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Jentoft, Friederike C.
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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

Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-012A-1

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