Hydrothermal treatment: an effective method to improve the catalytic activity of the Pt/ZSM-5 catalyst for complete benzene oxidation

Abstract

In this work, hydrothermal treatment surprisingly enhanced the catalytic activity of the Pt/ZSM-5 catalyst in benzene oxidation. It was confirmed that hydrothermal treatment at 400 °C partially destroyed the bridging OH groups on the catalyst, which may weaken the anchoring ability to Pt particles. Thus, Pt particles grew into larger ones with high Pt⁰ content and turnover frequency (21.69 × 10⁻³S⁻¹). Besides, the in situ DRIFTS demonstrated that benzene was more easily oxidized on hydrothermally treated Pt/ZSM-5.