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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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Citation

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. Retrieved from http://dx.doi.org/10.1016/j.susc.2007.04.012.


Cite as: http://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 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