| Title: | Simultaneously Constructing Active Sites and Regulating Mn-O Strength of Ru-Substituted Perovskite for Efficient Oxidation and Hydrolysis Oxidation of Chlorobenzene |
| Author(s): | Duan X; Zhao T; Niu B; Wei Z; Li G; Zhang Z; Cheng J; Hao Z; |
| Address: | "National Engineering Laboratory for VOCs Pollution Control Material & Technology, Research Center for Environmental Material and Pollution Control Technology, University of Chinese Academy of Sciences, Beijing, 101408, P. R. China" |
| ISSN/ISBN: | 2198-3844 (Electronic) 2198-3844 (Linking) |
| Abstract: | "Chlorinated volatile organic compounds (CVOCs) are a class of hazardous pollutants that severely threaten environmental safety and human health. Although the catalytic oxidation technique for CVOCs elimination is effective, enhancing the catalytic efficiency and simultaneously inhibiting the production of organic byproducts is still of great challenge. Herein, Ru-substituted LaMn(Ru)O(3+) (delta) perovskite with Ru-O-Mn structure and weakened Mn-O bond strength has been developed for catalytic oxidation of chlorobenzene (CB). The formed Ru-O-Mn structure serves as favorable sites for CB adsorption and activation, while the weakening of Mn-O bond strength facilitates the formation of active oxygen species and improves oxygen mobility and catalyst reducibility. Therefore, LaMn(Ru)O(3+) (delta) exhibits superior low-temperature activity with the temperature of 90% CB conversion decreasing by over 90 degrees C compared with pristine perovskite, and the deep oxidation of chlorinated byproducts produced in low temperature is also accelerated. Furthermore, the introduction of water vapor into reaction system triggers the process of hydrolysis oxidation that promotes CB destruction and inhibits the generation of chlorinated byproducts, due to the higher-activity *OOH species generated from the dissociated H(2) O reacting with adsorbed oxygen. This work can provide a unique, high-efficiency, and facile strategy for CVOCs degradation and environmental improvement" |
| Keywords: | Mn-O bond strength active sites chlorinated volatile organic compounds (CVOCs) elimination hydrolysis oxidation perovskite oxides; |
| Notes: | "PubMed-not-MEDLINEDuan, Xiaoxiao Zhao, Ting Niu, Ben Wei, Zheng Li, Ganggang Zhang, Zhongshen Cheng, Jie Hao, Zhengping eng 2022YFB3504200/National Key Research and Development Program of China/ 2022YFC3701902/National Key Research and Development Program of China/ 21707152/National Natural Science Foundation of China/ 22176189/National Natural Science Foundation of China/ Z181100000118003/Beijing Municipal Science and Technology Commission/ Fundamental Research Funds for the Central Universities/ Youth Innovation Promotion Association of Chinese Academy of Sciences/ Germany 2022/11/28 Adv Sci (Weinh). 2023 Jan; 10(3):e2205054. doi: 10.1002/advs.202205054. Epub 2022 Nov 27" |
