Significant Improvement of Catalytic Performance for Chlorinated Volatile Organic Compound Oxidation over RuOx Supported on Acid-Etched Co3O4

被引：140

作者：

Liu, Hao ^{[1
,2
]}

Yang, Jing ^{[1
,2
]}

Jia, Yanyan ^{[3
,4
,5
]}

Wang, Zhiqiang ^{[6
,7
]}

Jiang, Mingxiang ^{[1
,2
]}

Shen, Kai ^{[1
,2
]}

Zhao, Hailin ^{[1
,2
]}

Guo, Yanglong ^{[1
,2
]}

Guo, Yun ^{[1
,2
]}

Wang, Li ^{[1
,2
]}

Dai, Sheng ^{[3
,4
,5
]}

Zhan, Wangcheng ^{[1
,2
,5
]}

机构：

[1] East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China

[2] East China Univ Sci & Technol, Sch Chem & Mol Engn, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China

[3] East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China

[4] East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Inst Fine Chem, Shanghai 200237, Peoples R China

[5] East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Shanghai 200237, Peoples R China

[6] East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Key Lab Adv Mat, Sch Chem & Mol Engn,Ctr Computat Chem, Shanghai 200237, Peoples R China

[7] East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Joint Int Res Lab Precis Chem & Mol Engn, Sch Chem & Mol Engn,Ctr Computat Chem, Shanghai 200237, Peoples R China

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2021年 / 55卷 / 15期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

chlorinated volatile organic compounds; Ru active sites; acid etching; thermal stability; polychlorinated byproducts; LOW-TEMPERATURE; COMBUSTION; DICHLOROMETHANE; OXIDE; CE0.5ZR0.5O2; MECHANISM; BEHAVIOR; CERIA; CO;

D O I：

10.1021/acs.est.1c02970

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Ru catalysts have attracted increasing attention in catalytic oxidation of chlorinated volatile organic compounds (CVOCs). However, the development of Ru catalysts with high activity and thermal stability for CVOC oxidation still poses significant challenges due to their restrictive relationship. Herein, a strategy for constructing surface defects on Co3O4 support by acid etching was utilized to strengthen the interaction between active RuOx species and the Co3O4 support. Consequently, both the dispersity and thermal stability of RuOx species were significantly improved, achieving both high activity and stability of Ru catalysts for CVOC oxidation. The optimized Ru catalyst on the HF-etched Co3O4 support (Ru/Co3O4-F) achieved complete oxidation of vinyl chloride at 260 degrees C under 30 000 mL.g(-1).h(-1), which was lower than 300 degrees C for the Ru catalyst on the original Co3O4 (Ru/Co3O4). More importantly, the Ru species on the Ru/Co3O4-F catalyst were hardly lost after calcination at 500-700 degrees C and even reacting at 650 degrees C for 120 h. On this basis, the polychlorinated byproducts over the Ru/Co3O4-F catalyst were almost completely effaced by phosphate modification on the catalyst surface. These findings show that the method combining acid etching of the support and phosphate modification provides a strategy for the advancement of catalyst design for CVOC oxidation.

引用

页码：10734 / 10743

页数：10

共 45 条

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