| Title: | Revealing the mechanism of high water resistant and excellent active of CuMn oxide catalyst derived from Bimetal-Organic framework for acetone catalytic oxidation |
| Author(s): | Wang L; Sun Y; Zhu Y; Zhang J; Ding J; Gao J; Ji W; Li Y; Wang L; Ma Y; |
| Address: | "State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China. State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China. Electronic address: ygsun@nxu.edu.cn. State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China. Electronic address: Yulongma796@sohu.com" |
| DOI: | 10.1016/j.jcis.2022.04.155 |
| ISSN/ISBN: | 1095-7103 (Electronic) 0021-9797 (Linking) |
| Abstract: | "Environmental H(2)O is an influential factor in the low-temperature catalytic oxidation of volatile organic compounds (VOCs), and it significantly impacts the reaction process and mechanism. Here, a series of rod-like Cu-Mn oxides were synthesised by pyrolysing Cu/Mn-BTC for acetone oxidation. The results confirm that the formation of multiphase interfaces have more excellent catalytic performance compared to single-phase catalysis. This phenomenon can be attributed to the formation of multiphase interfaces, which resulted in the synthesized catalysts with more active oxygen species and defective sites. The CuMn(2)O(x) catalyst exhibited superior catalytic performance (T(90) = 150 degrees C), high water resistance and long-term stability. Furthermore, in situ diffuse reflectance infrared Fourier transform spectroscopy and thermal desorption-gas chromatography-mass spectrometry results indicated that the degradation pathway of acetone was as follows: acetone ((CH(3))(2)CO*) --> enolate complexes ((CH(2)) = C(CH(3)) O*) --> acetaldehyde ((CH(3)CHO*) --> acetate (CH(3)COO*) --> formate (HCOO*) --> CO(2) and H(2)O. At a low-temperature, water vapour dissociated a large number of activated hydroxyl groups on the multiphase interface, which promoted the dissociation of enolate complexes and acetaldehyde species. This composite oxide is a promising catalyst for removing oxygenated VOCs at high humidity" |
| Keywords: | Acetaldehyde Acetone Catalysis Oxidation-Reduction *Oxides/chemistry *Volatile Organic Compounds/chemistry Acetone oxidation Bimetallic MOF CuMn(2)O(4) Water resistance in-suit DRIFT; |
| Notes: | "MedlineWang, Lei Sun, Yonggang Zhu, Yinbo Zhang, Juan Ding, Jie Gao, Jingdan Ji, Wenxin Li, YuanYuan Wang, Liqiong Ma, Yulong eng 2022/05/09 J Colloid Interface Sci. 2022 Sep 15; 622:577-590. doi: 10.1016/j.jcis.2022.04.155. Epub 2022 Apr 30" |
