Non-Noble Metal Catalyst Design with Dual Oxygen–Chlorine Channels: Synergistic Cr–Zr Doping in Ceria for Complete Chlorobenzene Oxidation and Polychlorinated Byproduct Inhibition
Year: 2026
Type: article
Abstract: The development of efficient catalysts for CVOCs abatement remains challenging due to insufficient low-temperature activity, chlorine poisoning susceptibility, and toxic byproduct formation. This study addresses these limitations through rational design of Cr-Zr co-doped Ceria catalysts for efficient, stable and low toxic degradation of CB. The optimized (CeCr)3Zr1 catalyst demonstrates exceptional performance, maintaining >90% CB conversion over 50 h at 240 °C with minimal polychlorinated byproducts. Structure-performance mechanistic investigations reveal that Cr-Zr doping modulates Ce-O bond strength and generates high-density oxygen vacancies, enhancing lattice oxygen mobility and reactive oxygen species generation for deep oxidation. Concurrent Zr incorporation introduces Brønsted acid sites that promote HCl formation via proton-assisted Cl removal, effectively suppressing electrophilic chlorination of aromatic intermediates. These improvements reduce the occurrence of electrophilic chlorination reactions in intermediate products, thereby inhibiting the formation of polychlorinated byproducts, making it more promising for industrial applications.
Institutions: Zhejiang University, Zhejiang University of Technology
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7147691745