Abstract
The effect of high temperature hydrogen (or/and oxygen) treatment on the mobility of Ga 2O 3 supported on H-ZSM-5 was investigated by infrared (IR) spectroscopy. Hydrogen (or/and oxygen) treatments at 773 K produced a decrease in the number of acidic OH groups as shown by the change of the IR band intensity at 3610 cm −1. It is concluded that the reduced gallium oxide migrated within the zeolite, which caused interaction between Ga 2O 3 and H + to occur. The gallium species surface migration resulted in an ion exchange between Ga n+ and H +.
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