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Catalysts 2013, 3(3), 599-613; doi:10.3390/catal3030599
Article

Fabrication and Catalytic Activity of Thermally Stable Gold Nanoparticles on Ultrastable Y (USY) Zeolites

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Received: 22 April 2013; in revised form: 17 June 2013 / Accepted: 1 July 2013 / Published: 9 July 2013
(This article belongs to the Special Issue New Trends in Gold Catalysts)
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Abstract: Au was deposited on ultrastable Y (USY) zeolites using an ion-exchange method. Up to 5.5 wt% Au was introduced into the NH4-form of USY zeolites. In contrast, deposition of Au hardly took place on the H- and Na-forms of Y-type zeolites, NH4-forms of mordenite, and ZSM-5. Treatment of the Au-loaded USY zeolite in a H2 atmosphere, afforded Au0 nanoparticles. These particles were thermally stable even at 973 K, where their mean particle diameter was 3.7 nm. In contrast, highly aggregated Au particles were observed after thermal treatment at temperatures lower than 523 K, followed by storage in air for a month. The resulting particle sizes were in good correlation with the IR band intensity of the adsorbed CO and the catalytic activity of Au in the aerobic oxidation of benzyl alcohol. The Au nanoparticles showed highest activity when the Au/USY zeolite was thermally treated at 673–973 K. A negligible deactivation was observed after repeating the reaction at least 12 times. In the case of Au/TiO2 catalyst prepared by the deposition-precipitation method, the highest activity was observed at 573 K, which was lower than the temperature used for the Au/USY zeolites. This study demonstrated the potential use of the NH4-form of USY zeolites for supporting Au.
Keywords: gold cluster; nanoparticle; USY zeolite; Brønsted acid; partial oxidation gold cluster; nanoparticle; USY zeolite; Brønsted acid; partial oxidation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Sanada, T.; Murakami, C.; Góra-Marek, K.; Iida, K.; Katada, N.; Okumura, K. Fabrication and Catalytic Activity of Thermally Stable Gold Nanoparticles on Ultrastable Y (USY) Zeolites. Catalysts 2013, 3, 599-613.

AMA Style

Sanada T, Murakami C, Góra-Marek K, Iida K, Katada N, Okumura K. Fabrication and Catalytic Activity of Thermally Stable Gold Nanoparticles on Ultrastable Y (USY) Zeolites. Catalysts. 2013; 3(3):599-613.

Chicago/Turabian Style

Sanada, Takashi; Murakami, Chika; Góra-Marek, Kinga; Iida, Keiko; Katada, Naonobu; Okumura, Kazu. 2013. "Fabrication and Catalytic Activity of Thermally Stable Gold Nanoparticles on Ultrastable Y (USY) Zeolites." Catalysts 3, no. 3: 599-613.


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