Pt–ZnOx Interfacial Effect on the Performance of Propane Dehydrogenation and Mechanism StudyClick to copy article linkArticle link copied!
- Daoru LiuDaoru LiuSchool of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou 510006, ChinaMore by Daoru Liu
- Feifei JiangFeifei JiangSchool of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou 510006, ChinaMore by Feifei Jiang
- Qinghua ZhangQinghua ZhangInstitute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaMore by Qinghua Zhang
- Wei-Hsiang HuangWei-Hsiang HuangNational Synchrotron Radiation Research Center, Hsinchu 30076, TaiwanGraduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology (NTUST), Taipei 10607, TaiwanMore by Wei-Hsiang Huang
- Yanping ZhengYanping ZhengState Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, ChinaMore by Yanping Zheng
- Mingshu ChenMingshu ChenState Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, ChinaMore by Mingshu Chen
- Liming WuLiming WuState Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, ChinaMore by Liming Wu
- Ruixuan QinRuixuan QinState Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, ChinaMore by Ruixuan Qin
- Mingzhi WangMingzhi WangSchool of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou 510006, ChinaMore by Mingzhi Wang
- Shiyi ZhangShiyi ZhangSchool of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou 510006, ChinaMore by Shiyi Zhang
- Limin ChenLimin ChenSchool of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou 510006, ChinaMore by Limin Chen
- Keyou YanKeyou YanSchool of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou 510006, ChinaMore by Keyou Yan
- Linan ZhouLinan ZhouSpin-X Institute, School of Chemistry and Chemical Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510641, ChinaMore by Linan Zhou
- Yun Zhao*Yun Zhao*Email: [email protected]School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou 510006, ChinaMore by Yun Zhao
- Lin Gu*Lin Gu*Email: [email protected]Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaSchool of Materials Science and Engineering, Tsinghua University, Beijing 100083, ChinaMore by Lin Gu
- Guangxu Chen*Guangxu Chen*Email: [email protected]School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou 510006, ChinaMore by Guangxu Chen
Abstract
Bimetallic Pt-based catalysts, for example, PtZn and PtSn catalysts, have gained significant attention for addressing the poor stability and low selectivity of pristine Pt catalysts over propane dehydrogenation (PDH). However, the structures of the active sites and the corresponding catalytic mechanism of PDH are still elusive. Here, we demonstrate a spatially confined Pt–ZnmOx@RUB-15 catalyst (where “m” is the mole ratio of Zn/Pt and RUB-15 is a layered silica), which exhibited high catalytic activity, ultrahigh selectivity (>99%), and resistance to coking at 550 °C for PDH. Significantly different from the preliminary studies over the PtZn catalysts, through the assistance of quasi-in situ X-ray photoelectron spectroscopy (XPS), in situ Fourier transform infrared spectroscopy (CO-FTIR), in situ X-ray absorption spectroscopy (XAS), and CO titration, we discovered that the active sites for PDH were the Pt–ZnOx interfaces, characterized by a structure of Ptδ+–Zn2+–O–Si. Density functional theory (DFT) calculations showed that Pt atoms positioned at Pt–ZnOx interfaces with coordinatively unsaturated ZnOx sites facilitate the C–H bond breaking of propane while concurrently suppressing deep dehydrogenation processes. This study suggests that engineering the interfaces of Pt–metal oxides under spatially confined conditions holds promise for developing highly efficient Pt-based catalysts for light alkane dehydrogenation.
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