| Title: | Catalytic degradation of benzene over non-thermal plasma coupled Co-Ni binary metal oxide nanosheet catalysts |
| Author(s): | Jiang Z; Fang D; Liang Y; He Y; Einaga H; Shangguan W; |
| Address: | "Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, Shanghai 200240, China. Electronic address: zhijiang@sjtu.edu.cn. Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, Shanghai 200240, China. Department of Energy and Material Sciences, Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga Koen, Kasuga, Fukuoka 816-8580, Japan" |
| DOI: | 10.1016/j.jes.2022.09.030 |
| ISSN/ISBN: | 1001-0742 (Print) 1001-0742 (Linking) |
| Abstract: | "Non-thermal plasma (NTP) has been demonstrated as one of the promising technologies that can degrade volatile organic compounds (VOCs) under ambient condition. However, one of the key challenges of VOCs degradation in NTP is its relatively low mineralization rate, which needs to be addressed by introducing catalysts. Therefore, the design and optimization of catalysts have become the focus of NTP coupling catalysis research. In this work, a series of two-dimensional nanosheet Co-Ni metal oxides were synthesized by microwave method and investigated for the catalytic oxidation of benzene in an NTP-catalysis coupling system. Among them, Co(2)Ni(1)O(x) achieves 60% carbon dioxide (CO(2)) selectivity (S(CO2)) when the benzene removal efficiency (RE(benzene)) reaches more than 99%, which is a significant enhancement compared with the CO(2) selectivity obtained without any catalysts (38%) under the same input power. More intriguingly, this S(CO2) is also significantly higher than that of single metal oxides, NiO or Co(3)O(4), which is only around 40%. Such improved performance of this binary metal oxide catalyst is uniquely attributed to the synergistic effects of Co and Ni in Co(2)Ni(1)O(x) catalyst. The introduction of Co(2)Ni(1)O(x) was found to promote the generation of acrolein significantly, one of the key intermediates found in NTP alone system reported previously, suggest the benzene ring open reaction is promoted. Compared with monometallic oxides NiO and Co(3)O(4), Co(2)Ni(1)O(x) also shows higher active oxygen proportion, better oxygen mobility, and stronger low-temperature redox capability. The above factors result in the improved catalytic performance of Co(2)Ni(1)O(x) in the NTP coupling removal of benzene" |
| Keywords: | *Carbon Dioxide Benzene *Plasma Gases Oxides Oxidation-Reduction Catalysis Binary metal oxide Cobalt metal oxide Nickel oxide Nonthermal plasma; |
| Notes: | "MedlineJiang, Zhi Fang, Dongxu Liang, Yuting He, Yaoyu Einaga, Hisahiro Shangguan, Wenfeng eng Netherlands 2023/06/20 J Environ Sci (China). 2023 Oct; 132:1-11. doi: 10.1016/j.jes.2022.09.030. Epub 2022 Sep 27" |
