*2.4. Reactivity Studies*

The reactivity and selectivity analysis of the prepared catalysts was performed by passing the phenol gas through the catalyst in a stainless-steel fixed-bed reactor. An accurate reaction temperature was observed using an external thermocouple (Type K) located inside the reactor and next to the sample. In a typical run, 1 g of the sample was placed in the middle of the reactor. Prior to the main experiments at 500 ◦C, the samples were purged for one hour using the nitrogen gas with a 150 mL/min flow rate. Subsequently, the catalyst was activated for 2 h by hydrogen gas at 500 ◦C and 100 mL/min of flow rate. The main experiment began by injecting the feed to the reactor using an HPLC pump (Model: PU-980, JASCO) under N2 gas atmosphere. For analysis of the reaction products, the gas-phase products were collected using a condenser connected to a chiller. To obtain the run time of each product including cyclohexane, cyclohexene, and benzene, as well as n-hexane, phenol, and acetone, the standard curves have been created using the standard solutions.
