Abstract
Gold was deposited on ultrastable Y (USY) zeolite using a newly developed method: just mixing an aqueous solution of HAuCl4 and zeolite at 353 K in which the NH 4 + cation reacted with the Cl− in HAuCl4. Treatment of the Au-loaded USY zeolite in the atmosphere of hydrogen resulted in the formation of Au0 nanoclusters with 1.8 nm diameter at 773 K. The size of Au particle was dependent on the type of zeolite support, composition of gas atmosphere, and temperature of calcination, which was correlated with catalytic performance. This study demonstrated the potential use of zeolites with strong Brønsted acid character as gold supports.
Highlights
Since the pioneering work by Haruta and co-researchers, efforts have increasingly been directed toward the development of supported Au catalysts [1,2,3,4]
We developed a new method for loading Au on the zeolite support in which Au was loaded on NH4+-type ultrastable Y (USY) zeolites using an aqueous solution of HAuCl4
The catalytic activity of Au/ USY in the homocoupling reaction of phenylboronic acid was in good correlation with the dispersion of Au
Summary
Since the pioneering work by Haruta and co-researchers, efforts have increasingly been directed toward the development of supported Au catalysts [1,2,3,4]. Interest in these catalysts is fuelled by their unique catalytic performance in various reactions [5, 6].
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