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Hydrothermal ethanol conversion on Ag, Cu, Au/TiO2

  • Chemical Kinetics and Catalysis
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Abstract

The effect UV irradiation and silver, copper, and gold ions (Mz+) supported on titania (anatase) have on the activity of M/TiO2 samples in ethanol conversion at 150–400°C is examined. After UV irradiation, the yields of acetaldehyde and ethylene increase for TiO2 and Ag/TiO2 samples, while the activity of Cu2+/TiO2 decreases. The activation energy of ethanol dehydration declines in the order TiO2 > Au3+ > Cu2+ > Ag+ and correlates linearly with a reduction in the radius of Mz+ in crystal. The number of acidic sites on a M/TiO2 surface titrated via pyridine adsorption grows upon the introduction of M. Unlike Cu2+/TiO2, these sites are not activated after the irradiation of TiO2, Ag+/TiO2, and Au3+/TiO2. According to IR spectral data on adsorbed pyridine, all samples contain Lewis and Brönsted acidic sites.

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Authors and Affiliations

  1. People’s Friendship University, Moscow, 117198, Russia

    Do Tkhyui Mai, I. I. Mikhalenko & A. I. Pylinina

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  1. Do Tkhyui Mai
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  2. I. I. Mikhalenko
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  3. A. I. Pylinina
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Correspondence to I. I. Mikhalenko.

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Original Russian Text © Do Tkhyui Mai, I.I. Mikhalenko, A.I. Pylinina, 2014, published in Zhurnal Fizicheskoi Khimii, 2014, Vol. 88, No. 10, pp. 1473–1479.

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Mai, D.T., Mikhalenko, I.I. & Pylinina, A.I. Hydrothermal ethanol conversion on Ag, Cu, Au/TiO2 . Russ. J. Phys. Chem. 88, 1637–1642 (2014). https://doi.org/10.1134/S0036024414090118

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  • DOI: https://doi.org/10.1134/S0036024414090118

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