Time-Resolved Dynamic Observation of Solvent-Free and Organic Template-Free Solid-Phase Synthesis Process for Pt/ZSM-5 Encapsulated Structure

Open AccessCCS ChemistryRESEARCH ARTICLES24 Dec 2024Time-resolved Dynamic Observation of Solvents-free and Organic Template-free Solid-phase Synthesis Process for Pt/ZSM-5 Encapsulated Structure Xia Zhong, Jie Liu, Li Gao, Xiyang Wang, Ying Zhang, Yimin A. Wu, Mozaffar Shakeri, Xia Zhang and Bingsen Zhang Xia Zhong , Jie Liu , Li Gao , Xiyang Wang , Ying Zhang , Yimin A. Wu , Mozaffar Shakeri , Xia Zhang and Bingsen Zhang https://doi.org/10.31635/ccschem.024.202405038 SectionsSupplemental MaterialAboutPDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareFacebookTwitterLinked InEmail Zeolite-supported noble metal nanoparticles catalysts demonstrate distinctive properties in heterogeneous catalysis reactions. However, due to the limitations of conventional liquid-phase synthesis methods, understanding of dynamic crystallization mechanism of zeolites at microscopic scale is still limited. Importantly, it impedes the in-depth establishment of relationship between structure and reactivity. Herein, we successfully develop a unique solventfree and organic template-free solid-phase synthesis strategy for preparing Pt/ZSM-5 encapsulated structures to investigate the time-resolved dynamic evolution of zeolite crystallization process. By time-resolved X-ray atom pair distribution function and in-situ scanning electron microscopy technique, the " dissolution-recrystallization " transformation mechanism of structure evolution for zeolite is observed. This dynamic mechanism induces AlO4 structural distortion in Pt/ZSM-5 encapsulated structure, triggering strong metal-support interaction. The enhancement of Brønsted acid density and cationic of Pt mediates the process of cracking of C-C bonds and hydrogenation of C=C bonds. Pt NPs confined in mesoporous pore of ZSM-5 improves the mass transfer efficiency of reaction intermediates. Therefore, Pt/ZSM-5 exhibits remarkable polyethylene hydrocracking performance, achieving approximately 90% conversion and higher liquid fuel selectivity. The complementary analysis of multimodal spectroscopy and in-situ imaging techniques advance our fundamental understanding of structure-activity relationships in zeolite-supported noble metal nanoparticles catalysts. Download figure Download PowerPoint Previous articleNext article FiguresReferencesRelatedDetails Issue AssignmentNot Yet AssignedSupporting Information Copyright & Permissions© 2024 Chinese Chemical Society Downloaded 0 times PDF downloadLoading ...