标題: Metal organic frameworks derived metal oxides prepared by oxygen vacancy engineering with the enhanced catalytic activity for toluene oxidation

作者: Wang, DT (Wang, Deng-tai); Guo, N (Guo, Na); Jiang, LX (Jiang, Lu-xiang); Lian, SZ (Lian, Shi-Ze); Wang, ZW (Wang, Zu-Wu)

來源出版物: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 卷: 10 期: 6 文獻号: 108798 DOI: 10.1016/j.jece.2022.108798 出版年: DEC 2022

摘要: Herein, MnOx catalysts were prepared by in situ pyrolysis of Mn metal organic frameworks (Mn-MOF). The Mn-5TA with proper doping of tartaric acid (Mn-MOF/ tartaric acid mass ratio of 5), exhibited superior catalytic activity and stability towards catalytic removal of toluene under simulated real-exhaust conditions. Mn3+ and oxygen vacancies were beneficial for toluene degradation, whereas Mn3+ can generate oxygen vacancies to maintain charge conservation and then responsible for toluene adsorption and generation of intermediates. In addition, the oxygen vacancies were explored by EPR, Raman and O2-TPD. Compared with other catalysts, Mn-5TA has higher oxygen vacancy contents. Meanwhile, in-situ DRIFTS also indicated that oxygen vacancies could play a key role in the adsorption-oxidation process of toluene. Therefore, the present study provides a simple method to introduce and control the content of oxygen vacancies, and the obtained results provide a new strategy for the rational design of efficient catalytic materials for the elimination of volatile organic compounds.

作者關鍵詞: MOF-derived metal oxides; Oxygen vacancy; Toluene oxidation; Mn-based catalyst

地址: [Wang, Deng-tai; Guo, Na; Jiang, Lu-xiang; Lian, Shi-Ze; Wang, Zu-Wu] Wuhan Univ, Sch Resources & Environm Sci, 299 Bayi Rd, Wuhan 430072, Peoples R China.

通訊作者地址: Wang, ZW (通訊作者)，Wuhan Univ, Sch Resources & Environm Sci, 299 Bayi Rd, Wuhan 430072, Peoples R China.

電子郵件地址: hjgcapc@163.com

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