| Title: | Vinyl chloride catalytic combustion on Pt/CeO(2): Tuning Pt chemical state to promote Cl removing |
| Author(s): | Zhang Q; Liu J; Wang C; Guo Y; Zhan W; Wang L; Gong X; Guo Y; |
| Address: | "Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China. Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China. Electronic address: wangli@ecust.edu.cn" |
| DOI: | 10.1016/j.chemosphere.2022.135861 |
| ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
| Abstract: | "Supported Pt catalysts usually produce chlorinated byproducts during chlorinated volatile organic compounds (CVOCs) combustion, the removal of formed surface chlorine species is the key to improve the activity, selectivity and stability. In this paper, the Pt chemical state is adjusted by the interaction between Pt and CeO(2) through controlling the morphology of CeO(2), which further affects the catalytic performance of VC combustion. For Pt/CeO(2)-octahedron, the weak interaction between Pt and CeO(2) results in the formation of PtO(2), facilities VC adsorption and C-Cl bonds cleavage and becomes a key active site to accommodate the dissociated Cl species. While the strong interaction leads to the formation of Pt(x)Ce(1-x)O(2-sigma) solid solution on Pt/CeO(2)-rod has relative lower ability in Cl species removal compared with PtO(2). Density functional theory (DFT) calculations also confirms that the introduced Pt species reduces the concentration of Cl species on the surface as well as the chlorinated-byproducts. Hence, Pt/CeO(2)-octahedron outperformed Pt/CeO(2)-rod and Pt/CeO(2)-cube with 90% VC conversion at 280 degrees C. Furthermore, under the same VC conversion (90%), the concentration of chlorinated byproducts on Pt/CeO(2)-octahedron was only 4% than that of Pt/CeO(2)-rod" |
| Keywords: | Byproducts control Catalytic combustion CeO(2) Pt Vinyl chloride; |
| Notes: | "PubMed-not-MEDLINEZhang, Qifeng Liu, Jiyuan Wang, Chen Guo, Yanglong Zhan, Wangcheng Wang, Li Gong, Xueqing Guo, Yun eng England 2022/08/11 Chemosphere. 2022 Nov; 307(Pt 2):135861. doi: 10.1016/j.chemosphere.2022.135861. Epub 2022 Aug 7" |
