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Boosted 1,2-Dichloroethane Deep Destruction over CoRu/Al2O3Bifunctional Catalysts viaSurface Oxygen and Water Molecule Synergistic Activation

Authors :
Tian, Mingjiao
Xu, Han
Zhao, Yaruo
Jiang, Zeyu
Wan, Jialei
Jian, Yanfei
Chai, Shouning
Li, Lu
Ma, Mudi
Sun, Yukun
Ren, Shan
Li, Xinzhe
Zheng, Chunli
Albilali, Reem
He, Chi
Source :
Environmental Science & Technology; November 2024, Vol. 58 Issue: 44 p19872-19882, 11p
Publication Year :
2024

Abstract

Developing efficacious catalysts with superior Cl resistance and polychlorinated byproduct inhibition capability is crucial for realizing the environmentally friendly purification of chlorinated volatile organic compounds (CVOCs). Activating CVOC molecules and desorbing Cl species by modulating the metal–oxygen property is a promising strategy to fulfill these. Herein, a bifunctional CoRu/Al2O3catalyst with synergistic Co and Ru interactions (Ru–O–Co species) was rationally fabricated, which possesses abundant surface Co2+and Ruδ+sites and collaboratively facilitates the activation of lattice oxygen (O2–) and molecular oxygen (O2→ O2–→ O–), accelerating 1,2-dichloroethane (1,2-DCE) decomposition viathe reaction route of enolic species → aldehydes → carboxylate/carbonate. Furthermore, CoRu/Al2O3stimulates 1,2-DCE oxidation under humid conditions as H2O molecules can be easily activated to active *OH (potential oxidizing agent) over Ru species, accelerating C–Cl dissociation and Cl desorption and promoting the transformation of catecholate-type (C═O) species to easily oxidizable carboxylic acid (COOH) species, remarkably suppressing the formation of hazardous CCl4and CHCl2CH2Cl. This study provides critical insights into the development of bifunctional catalysts to synergistically activate surface oxygen species and H2O molecules for industrial CVOC stable and efficient elimination.

Details

Language :
English
ISSN :
0013936X and 15205851
Volume :
58
Issue :
44
Database :
Supplemental Index
Journal :
Environmental Science & Technology
Publication Type :
Periodical
Accession number :
ejs67774899
Full Text :
https://doi.org/10.1021/acs.est.4c05663