Pt and Mo Co-Decorated MnO2 Nanorods with Superior Resistance to H2O, Sintering, and HCl for Catalytic Oxidation of Chlorobenzene

被引：87

作者：

Chen, Gong ^{[1
]}

Cai, Yuanpu ^{[1
]}

Zhang, Hao ^{[1
]}

Hong, Dongsen ^{[1
]}

Shao, Shijie ^{[1
]}

Tu, Chensheng ^{[1
]}

Chen, Yuexiang ^{[1
]}

Wang, Feng ^{[1
]}

Chen, Biao ^{[1
]}

Bai, Yuting ^{[1
]}

Wang, Xingyi ^{[1
]}

Dai, Qiguang ^{[1
]}

机构：

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

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2021年 / 55卷 / 20期

基金：

上海市自然科学基金; 中国国家自然科学基金;

关键词：

catalytic combustion; CVOCs; manganese oxide; acid-redox; thermal stability; chemical stability; COMBUSTION; 1,2-DICHLOROETHANE; INSIGHTS; OXYGEN; XPS;

D O I：

10.1021/acs.est.1c05086

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

MnO2 nanorods with exposed (110), (100), or (310) facets were prepared and investigated for catalytic oxidation of chlorobenzene, then the (110)-exposed MnO2 nanorod was screened as the candidate parent and further modified by Pt and/ or Mo with different contents. The loading of Pt enhanced activity and versatility of the pristine MnO2, but the polychlorinated byproducts and Cl-2 were promoted, conversely, as the decoration of Mo inhibited the polychlorinated byproducts and improved durability. Determination of structure and properties suggested that Pt facilitated the formation of more oxygen vacancies/Mn3+ and surface adsorbed oxygen weakened the bonds of surface lattice oxygen, while Mo stabilized surface lattice oxygen and increased acid sites, especially Bronsted acid sites. Expectedly, Pt and Mo bifunctionally modified MnO2 presented a preferable activity, selectivity, and durability along with the super resistance to H2O, hightemperature, and HCl, and no prominent deactivation was observed within 30 h at 300 degrees C under dry and humid conditions, even at high-temperature aging at 600 degrees C and HCl-pretreatment (7 h). In this work, the optimized Mo and Pt codecorated MnO2 was considered a promising catalyst toward practical applications for catalytic oxidation of actual Cl-VOCs emissions.

引用

页码：14204 / 14214

页数：11

共 39 条

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