Active Interfacial Perimeter in Pt/CeO2 Catalysts with Embedding Structure for Water-Tolerant Toluene CombustionClick to copy article linkArticle link copied!
- Menglan XiaoMenglan XiaoFlavors and Fragrance Engineering and Technology Research Center of Henan Province, College of Tobacco Science, Henan Agricultural University, Zhengzhou 450046, P. R. ChinaBeijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. ChinaMore by Menglan Xiao
- Dawei HanDawei HanBeijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. ChinaMore by Dawei Han
- Xueqin YangXueqin YangCollege of Forestry, Henan Agricultural University, Zhengzhou 450002, P. R. ChinaMore by Xueqin Yang
- Jing YuJing YuBeijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. ChinaMore by Jing Yu
- Bo ShiBo ShiCollege of Chemistry and Materials Science, Hebei Key Laboratory of Inorganic Nano-materials, Hebei Normal University, Shijiazhuang 050024, P. R. ChinaMore by Bo Shi
- Yucong GuoYucong GuoBeijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. ChinaMore by Yucong Guo
- Xiaolin Yu*Xiaolin Yu*Email: [email protected]School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. ChinaMore by Xiaolin Yu
- Maofa Ge*Maofa Ge*Email: [email protected]Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. ChinaUniversity of Chinese Academy of Sciences, Beijing 100049, P. R. ChinaMore by Maofa Ge
Abstract
Supported Pt catalysts are often subjected to severe deactivation under the conditions of high temperature and water vapor in catalytic oxidation; thus, the superior stability and water-resistant ability of catalysts have great significance for the effective degradation of volatile organic compounds (VOCs). Herein, we constructed a Pt/CeO2-N catalyst with an active interfacial perimeter, in which Pt species were partially embedded in the defective CeO2-N support to prevent the sintering. A significant charge transfer between Pt species and ceria in the embedding structure occurred via the Pt-CeO2 interface, which induced the formation of a Pt4+-Ov-Ce3+ interfacial structure. Experimental research and theoretical calculations demonstrated that the active Pt4+-Ov-Ce3+ interface promoted the activation and migration of lattice oxygen, thus facilitating the participation of oxygen species in toluene oxidation. Consequently, Pt/CeO2-N showed excellent catalytic performance for toluene degradation. In situ DRIFTS and DFT calculation proved that the Pt4+-Ov-Ce3+ interfacial sites served as the intrinsic active center in the dissociation of H2O to generate ·OH, which contributed to the formation of benzaldehyde, thus remarkably improving the water-resistant property. This study provided a facile strategy for fabricating the interfacial embedding structure to enhance the catalytic activity and water tolerance for eliminating VOCs in practical application.
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