标题: Efficacious destruction of typical aromatic hydrocarbons over CoMn/Ni foam monolithic catalysts with boosted activity and water resistance

作者: Wang, DT (Wang, Dengtai); Jiang, LX (Jiang, Luxiang); Tian, MJ (Tian, Mingjiao); Liu, J (Liu, Jing); Zhan, Y (Zhan, Yi); Li, XX (Li, Xiaoxiao); Wang, ZW (Wang, Zuwu); He, C (He, Chi)

来源出版物: JOURNAL OF COLLOID AND INTERFACE SCIENCE 卷: 668 页: 98-109 DOI: 10.1016/j.jcis.2024.04.165 Published Date: 2024 AUG 15

摘要: Developing cost-effective monolith catalyst with superior low-temperature activity is critical for oxidative efficacious removal of industrial volatile organic compounds (VOCs). However, the complexity of the industrial flue gas conditions demands the need for high moisture tolerance, which is challenging. Herein, CoMn - Metal Organic Framework (CoMn - MOF) was in situ grown on Ni foam (NiF) at room temperature to synthesize the cost-effective monolith catalyst. The optimized catalyst, Co1Mn1/NiF, exhibited excellent performance in toluene oxidation ( T 90 = 239 degrees C) due to the substitution of manganese into the cobalt lattice. This substitution weakened the Co - O bond strength, creating more oxygen vacancies and increasing the active oxygen species content. Additionally, experimentally and computationally evidence revealed that the mutual inhibiting effect of three typical aromatic hydrocarbons (benzene, toluene and m - xylene) over the Co1Mn1/NiF catalyst was attributed to the competitive adsorption occurring on the active site. Furthermore, the Co1Mn1/NiF catalyst also presents outstanding water resistance, particularly at a concentration of 3 vol%, where the activity is even enhanced. This was attributed to the lower water adsorption and dissociation energy derived from the interaction between the bimetals. Results demonstrate that the dissociation of water vapor enables more reactive oxygen species to participate in the reaction which reduces the formation of intermediates and facilitates the reaction. This investigation provides new insights into the preparation of oxygen vacancy-rich monolith catalysts with high water resistance for practical applications.

作者关键词: Aliovalent substitution; Monolith catalyst; VOC oxidation; Oxygen vacancy; Water resistance

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

[Tian, Mingjiao] Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Shaanxi, Peoples R China.

[He, Chi] Xi An Jiao Tong Univ, Sch Energy & Power Engn, State Key Lab Multiphase Flow Power Engn, Xian 710049, Shaanxi, Peoples R China.

[Liu, Jing] Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, 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：9.4