Catalytic Hydrogenation Removal of Typical Halophenol Odorous Substances by Palladium Catalysts Confined in UiO-66

• • Pd@UiO-66 achieved >90% removal of 4-CP within 15 minutes, demonstrating rapid catalytic hydrodechlorination suitable for water treatment applications. • • The initial activity of Pd@UiO-66 was 2.1 times higher than that of Pd/UiO-66, and the turnover frequency was 1.2 times higher, indicating superior catalytic efficiency due to confinement effects. • • Pd@UiO-66 maintained over 90% of its initial activity after five reaction cycles, with activity change below 10%, showcasing excellent operational stability for repeated use. • • The sole degradation product was phenol, which has significantly lower predicted toxicity (ECOSAR) than 4-CP, confirming the detoxification capability of the process.