Rationally Fabricated Ce–Mn@ZrO2–SO42– Catalyst Boosts the Efficient Destruction of Chlorobenzene with SO2 Impurity: Synergy of Surface SO42– and Acidic Sites DOI
Yukun Sun, Shuai Xu, Bo Bai

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: March 7, 2025

The catalytic deactivation caused by SO2 impurity remains a great challenge in the efficient destruction of industrial chlorinated volatile organic compounds (CVOCs). Herein, Ce-Mn@ZrO2-SO42- catalyst with Ce-O-Mn active system and ZrO2-SO42- protective layer was rationally engineered, which exhibits superior activity for chlorobenzene (CB) cotreatment at 228 °C, achieving 90% CB mineralization─over 80% higher than that CeO2 catalyst. In situ characterization theoretical calculation results reveal SO42- groups not only inhibit adsorption molecules through steric hindrance electrostatic repulsion but also act as Brønsted acid sites (BAS) to promote C-Cl cleavage accelerate desorption Cl radicals inorganic chlorine (HCl Cl2). Additionally, structure accelerates electron transfer between sites, enhances strength Lewis (LAS), weakens lattice oxygen stability generate vacancies (Ov). These features collectively result excellent sulfur resistance Compared Ce-Mn@ZrO2, sulfated byproducts respectively decrease 7.9 2.7 times presence 100 ppm SO2. This study provides feasible promising strategy engineering efficacious non-noble metal catalysts toward CVOCs' deep purification impurity, showcasing substantial economic environmental benefits.

Language: Английский

Rationally Fabricated Ce–Mn@ZrO2–SO42– Catalyst Boosts the Efficient Destruction of Chlorobenzene with SO2 Impurity: Synergy of Surface SO42– and Acidic Sites DOI
Yukun Sun, Shuai Xu, Bo Bai

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: March 7, 2025

The catalytic deactivation caused by SO2 impurity remains a great challenge in the efficient destruction of industrial chlorinated volatile organic compounds (CVOCs). Herein, Ce-Mn@ZrO2-SO42- catalyst with Ce-O-Mn active system and ZrO2-SO42- protective layer was rationally engineered, which exhibits superior activity for chlorobenzene (CB) cotreatment at 228 °C, achieving 90% CB mineralization─over 80% higher than that CeO2 catalyst. In situ characterization theoretical calculation results reveal SO42- groups not only inhibit adsorption molecules through steric hindrance electrostatic repulsion but also act as Brønsted acid sites (BAS) to promote C-Cl cleavage accelerate desorption Cl radicals inorganic chlorine (HCl Cl2). Additionally, structure accelerates electron transfer between sites, enhances strength Lewis (LAS), weakens lattice oxygen stability generate vacancies (Ov). These features collectively result excellent sulfur resistance Compared Ce-Mn@ZrO2, sulfated byproducts respectively decrease 7.9 2.7 times presence 100 ppm SO2. This study provides feasible promising strategy engineering efficacious non-noble metal catalysts toward CVOCs' deep purification impurity, showcasing substantial economic environmental benefits.

Language: Английский

Citations

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