Preparation of ɛ-MnO2 with different morphologies and their catalytic combustion of toluene

被引：0

作者：

Yu W. ^{[1
]}

Cheng G. ^{[1
,2
]}

Cui X. ^{[1
]}

Zeng X. ^{[1
]}

Lan B. ^{[2
,4
]}

Li Y. ^{[1
,2
]}

Zhang C. ^{[3
]}

Sun M. ^{[1
,2
]}

Yu L. ^{[1
,2
]}

机构：

[1] School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou

[2] Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Guangdong University of Technology, Guangzhou

[3] Guangdong ZhongTou Environmental Protection Co., Ltd., Guangzhou

[4] School of Chemistry and Environment, Jiaying University, Meizhou

来源：

Huagong Jinzhan/Chemical Industry and Engineering Progress | 2021年 / 40卷 / 10期

关键词：

Catalyst; Manganese dioxide; Morphology; Nanomaterials; Oxidation;

D O I：

10.16085/j.issn.1000-6613.2020-2037

中图分类号：

学科分类号：

摘要：

ɛ-MnO2 with different morphologies, including sphere, ellipsoid and cube were prepared by three methods and their catalytic activities were investigated by catalytic combustion of toluene. The physicochemical properties of the ɛ-MnO2 catalysts were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), N2 adsorption-desorption, X-ray photoelectron spectrum (XPS), and H2-programmed temperature reduction (H2-TPR). The results showed that the catalytic activity of ɛ-MnO2 depended strongly on the morphology, following the sequence of sphere > cube > ellipsoid. The superior catalytic activity of sphere-like ɛ-MnO2 was due to its larger surface area, higher content of Mn3+ and better reducibility. Moreover, the sphere-like ɛ-MnO2 still kept good catalytic activity after a 60h long-term test. © 2021, Chemical Industry Press Co., Ltd. All right reserved.

引用

页码：5547 / 5553

页数：6

共 34 条

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