Ion-Exchanged Cu-SSZ-13 for Catalytic Removal of Dichloromethane: The Essence of Isolated Cu Cations and Reaction Mechanism.

ABSTRACT: An ion-exchanged Cu-SSZ-13 catalyst exhibited excellent performance in the deep oxidation of dichloromethane, achieving a high reaction rate of 2.41 mmol g^-1 h^-1 at 200 °C without producing chlorine-containing byproducts. Detailed characterizations indicated abundant isolated Cu species, specifically, [ZCu²⁺(OH)]⁺ and Z₂Cu²⁺, in the catalyst. Quantitative analysis of the activity results demonstrated that the Z₂Cu²⁺ in a 6-membered ring had the highest activity (with a turnover frequency of 1.8 × 10^-3 s^-1 at 200 °C), which was 5-fold higher than that of the [ZCu²⁺(OH)]⁺ species in an 8-membered ring and 9-fold higher than the acid sites in the SSZ-13 support.

SUBMITTER: OuYang LR 

PROVIDER: S-EPMC12569670 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature