标题: Expediting catalytic performance and water resistance of toluene decomposition over MnOx through alkali metal doping induced electronic modulation

作者: Wang, DT (Wang, Dengtai); Yuan, C (Yuan, Chang); Guo, N (Guo, Na); Jiang, LX (Jiang, Luxiang); Wang, ZW (Wang, Zuwu); Wang, K (Wang, Kun); Zhuge, L (Zhuge, Lei)

来源出版物: SEPARATION AND PURIFICATION TECHNOLOGY  卷: 354  文献号: 129197  DOI: 10.1016/j.seppur.2024.129197  Early Access Date: AUG 2024  Published Date: 2025 FEB 19  子辑: 6  

摘要: Achieving rapid ring-opening is considered the rate-limiting step in toluene oxidation, with water vapor having a positive effect on this objective. Herein, we propose a novel strategy for preparing K/MnOx catalyst by means of a secondary hydrothermal approach, capable of reducing the generation of intermediates and fosters a positive feedback loop in toluene oxidation by accelerating water dissociation. As indicated by characterizations, the presence of K not only effectively promotes the generation of reactive oxygen species and Mn3+ by expediting the electron transfer between Mn and O species but also act as a dopant to create more oxygen vacancies and therefore boosting the catalytic performance. Interestingly, despite competing adsorption of water molecules with toluene, the excellent water dissociation capability of K/MnOx creates a reactive oxygen species-rich surrounding. This environment facilitates ring cleavage stemming and ensures low-temperature oxidation of toluene simultaneously. The present study provides a new insight into the practical use of Mn-based catalysts for toluene decomposition.

作者关键词: Alkali promoter; Electronic transfer; VOC oxidation; Water resistance; Ring-opening

地址: [Wang, Dengtai; Jiang, Luxiang; Wang, Zuwu] Wuhan Univ, Sch Resources & Environm Sci, 299 Bayi Rd, Wuhan 430072, Peoples R China.

[Yuan, Chang] Wuhan Business Univ, Sch Mech & Elect Engn, 816 Dongfeng Ave, Wuhan 430056, Peoples R China.

[Guo, Na] Henan Univ Technol, Sch Environm Engn, Zhengzhou 450001, Henan, Peoples R China.

[Wang, Kun; Zhuge, Lei] Second Prospecting Team Shandong Coal Geol Bur, Jining, Peoples R China.

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

电子邮件地址: hjgcapc@163.com

影响因子：7.4