陈世鸿¹, 唐诗昌¹, 庄檾希^1a, 苏雅静^1a, 黄俊诗¹, 凌伟钊¹,黄文京², 程 高^1,3, 李永峰^1,3

（1. 广东工业大学 a. 轻工化工学院; b. 广东省教育厅清洁化学技术重点实验室, 广东 广州 510006;2. 广东绿园环保科技有限公司, 广东 梅州 514700;3. 化学与精细化工广东省实验室揭阳分中心(榕江实验室), 广东 揭阳 515200）

引用格式：陈世鸿, 唐诗昌, 庄檾希, 等. 制备方法对铈锰固溶体催化燃烧甲苯性能的影响[J]. 中国粉体技术, 2023, 29(4): 138-149.

CHEN S H, TANG S C, ZHUANG Q X, et al. Effect of preparation methods on catalytic performance of cerium manganese solid solution for catalytic toluene combustion[J]. China Powder Science and Technology, 2023, 29(4): 138-149.

DOI：10.13732/j.issn.1008-5548.2023.04.014

收稿日期：2022-11-13，修回日期：2023-04-26，在线出版时间：2023-06-26 10:14。

基金项目：国家自然科学基金项目,编号:22278086;广州市基础研究计划基础与应用基础研究项目,编号:202201010373;佛山市促进高校科技成果服务产业发展扶持项目,编号:zc02030000007。

第一作者简介：陈世鸿(1997—),男,硕士研究生,研究方向为环境催化。E-mail: 2406586194@qq.com。

通信作者简介：程高(1988—),男,讲师,博士,研究方向为环境催化。E-mail: chengg36@gdut.edu.cn。

摘要：以甲苯为代表的挥发性有机化合物的排放，导致大气污染问题加剧。为了开发一种高效的用于甲苯催化燃烧反应的催化剂，采用水热法、热分解法和共沉淀法制备3种Ce0.7Mn0.3O2样品，分别用于催化甲苯燃烧反应，并通过X射线衍射、扫描电镜、透射电镜、氮气物理吸附-脱附、 X射线光电子能谱、 H2程序升温还原、原位红外光谱测试对3种样品进行表征，探究制备方法对Ce0.7Mn0.3O2催化剂结构、形貌、化学性质和催化燃烧甲苯性能的影响。结果表明：3种方法制备的Ce0.7Mn0.3O2均为纳米颗粒；相较于其他2种方法，采用水热法制备的Ce0.7Mn0.3O2具有更丰富的表面Mn3+、表面氧空位以及较强的低温可还原性，因此在甲苯催化燃烧反应中表现出良好的催化活性，在218℃时甲苯的转化率达到90%;此外，该样品具有优异的稳定性，在218℃下进行50 h的稳定性测试后，仍能保持较高的甲苯转化率(约为90%);原位红外测试表明，水热法制备的Ce0.7Mn0.3O2样品表面的催化燃烧甲苯反应遵循Marse-van Krevelen机制。

关键词：铈锰固溶体; 甲苯; 催化燃烧反应

Abstract：With the aggravation of air pollution, the pollution of volatile organic compounds(VOCs) represented by toluene becomes more and more serious. In order to develop an efficient catalyst for toluene catalytic combustion reaction, three Ce0.7Mn0.3O2 samples were prepared by hydrothermal, thermal decomposition and precipitation methods for catalytic combustion of toluene. The three samples were characterized by X-Ray diffraction, the scanning electron microscopy, the transmission electron microscopy, N2 adsorption-desorption, X-ray photoelectron spectroscopy, H2 temperature programmed reduction and in-situ infrared spectrometer analysis. The effect of the preparation method on the structure, morphology, chemical properties and catalytic combustion performance of Ce0.7Mn0.3O2 catalyst was investigated. The results show that the three Ce0.7Mn0.3O2 samples exhibit the same shape of nanoparticle. Compared to the other two samples, Ce0.7Mn0.3O2 prepared by the hydrothermal method shows better catalytic activity for the catalytic combustion of toluene due to a more abundant surface Mn3+, surface oxygen vacancies and stronger low-temperature reduction. The 90% toluene conversion rate is achieved at 218 ℃. In addition, the sample has excellent stability, and still maintains a high toluene conversion rate(about 90%) after stability test at 218 ℃ for 50 h. In situ FTIR test shows that the catalytic combustion of toluene on the surface of the Ce0.7Mn0.3O2 samples prepared by hydrothermal method follows the Marse-van Krevelen mechanism.

Keywords：cerium manganese solid solution; toluene; catalytic combustion reaction

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