| Title: | Influences of different surface oxygen species on oxidation of toluene and/or benzene and their reaction pathways over Cu-Mn metal oxides |
| Author(s): | Li M; Zhang W; Zhang X; Lian Y; Niu X; Zhu Y; |
| Address: | "Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, 150080, PR China. Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, 150080, PR China. Electronic address: chyflian@hlju.edu.cn. Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, 150080, PR China. Electronic address: niuxiaoyu@hlju.edu.cn. Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, 150080, PR China. Electronic address: yujunzhu@hlju.edu.cn" |
| DOI: | 10.1016/j.jcis.2022.10.107 |
| ISSN/ISBN: | 1095-7103 (Electronic) 0021-9797 (Linking) |
| Abstract: | "Catalytic oxidation is considered as the most effective and economical method to remove low concentration volatile organic compounds (VOCs). Activation of oxygen to form active oxygen species on metal oxides catalyst plays a key role in the process. Three copper-manganese oxide catalysts with cubic Cu(1.5)Mn(1.5)O(4) phases were prepared by microwave heating (CM-MW), sol-gel (CM-SG) and co-precipitation (CM-CP) methods, and applied for the elimination of toluene and benzene as representative aromatic VOCs. These catalysts exhibit different catalytic oxidation performance due to their different physicochemical properties. Various characterizations were used to clarify the role of different oxygen species in the oxidation of VOCs, and the reaction pathway. In situ DRIFTS were carried out to explore the function of surface adsorbed oxygen, oxygen vacancy, and surface lattice oxygen in the catalytic oxidation of VOCs over three catalysts. Various types of intermediate species and detailed reaction pathways are also explored by combining in situ DRIFTS and mass spectrometry. Among these catalysts, CM-MW with nanosheet morphology shows the best catalytic oxidation performance of toluene and/or benzene with/without H(2)O due to the most abundant active oxygen species, and the highest oxygen vacancy concentration which is beneficial to activate oxygen. Meanwhile, toluene and benzene do not interfere with each other during the mixture oxidation. This study can provide new inspiration for rational design of metal oxide catalysts to remove VOCs" |
| Keywords: | *Toluene/analysis/chemistry Benzene/chemistry Oxygen/chemistry Reactive Oxygen Species Oxides/chemistry Catalysis *Volatile Organic Compounds/chemistry Copper-manganese oxide Microwave heating method Oxidation of toluene and benzene Reaction pathways Role; |
| Notes: | "MedlineLi, Mingyang Zhang, Wanlu Zhang, Xuewei Lian, Yongfu Niu, Xiaoyu Zhu, Yujun eng 2022/11/04 J Colloid Interface Sci. 2023 Jan 15; 630(Pt B):301-316. doi: 10.1016/j.jcis.2022.10.107. Epub 2022 Oct 26" |
