Generation of abundant oxygen vacancies in Fe doped 6-MnO2 by a facile interfacial synthesis strategy for highly efficient catalysis of VOCs oxidation

被引：77

作者：

Yang, Shuo ^{[1
]}

Qi, Zitao ^{[1
]}

Wen, Yuce ^{[1
]}

Wang, Xiaoxiang ^{[1
]}

Zhang, Shihan ^{[2
]}

Li, Wei ^{[1
]}

Li, Sujing ^{[1
]}

机构：

[1] Zhejiang Univ, Inst Ind Ecol & Environm, Coll Chem & Biol Engn, Key Lab Biomass Chem Engn,Minist Educ, Hangzhou 310027, Peoples R China

[2] Zhejiang Univ Technol, Coll Environm, Key Lab Microbial Technol Ind Pollut Control Zheji, Hangzhou 310014, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2023年 / 452卷

关键词：

Fe doped?-MnO2; Interfacial redox-precipitation method; VOCs oxidation; Oxygen vacancies; In-situ DRIFTS; DFT calculation; VOLATILE ORGANIC-COMPOUNDS; OXIDE CATALYSTS; TOLUENE; CO3O4; CO; PERFORMANCE; COMBUSTION; REDUCTION; REMOVAL; NANOPARTICLES;

D O I：

10.1016/j.cej.2022.139657

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A series of homogenous Fe-Mn oxides with superior catalytic oxidation activity was developed via interfacial redox-precipitation method for eliminating VOCs from industrial waste gas. Among them, Fe1Mn5 oxide achieved the optimum catalytic performance for toluene oxidation with a T90 of 209 degrees C. In addition, the catalyst demonstrated superior stability for long-time operation and great water resistance. By combining an array of analytical techniques with DFT calculations, the results revealed that Fe doping and interfacial redox-precipitation method synergistically resulted in high concentration of oxygen vacancy defect over Fe1Mn5 oxide, which improved lattice oxygen mobility and oxygen species activity, thus enhancing its low temperature reducibility. Meanwhile, in situ DRIFTS analysis revealed that both the adsorbed oxygen species and lattice oxygen with improved mobility could interact with adsorbed toluene, thus facilitating rapid dehydrogenation of methyl and demethylation of toluene and promoting the breakage of C--C bond in the aromatic ring.

引用

页数：13

共 67 条

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