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Selective Incorporation of Iron Sites into MFI Zeolite Framework by One-Pot Synthesis
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2023-03-12 , DOI: 10.1021/acs.cgd.2c01479
Xunming Su 1, 2, 3 , Zhong-Pan Hu 2, 3 , Jingfeng Han 2, 3 , Yingxu Wei 2, 3 , Zhongmin Liu 1, 2, 3
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2023-03-12 , DOI: 10.1021/acs.cgd.2c01479
Xunming Su 1, 2, 3 , Zhong-Pan Hu 2, 3 , Jingfeng Han 2, 3 , Yingxu Wei 2, 3 , Zhongmin Liu 1, 2, 3
Affiliation
Developing highly efficient methods to selectively incorporate active metal sites into the zeolite framework is crucial for the large-scale utilization of metal-zeolites in various catalytic reactions including alkane conversion. Herein, ferrous gluconate is developed as an efficient metal precursor to embed Fe atoms into the MFI siliceous zeolite framework. The crystallization time and Si/Fe ratio are systematically investigated. It is revealed that the ferrous gluconate is well soluble and stable under alkaline conditions, allowing ferrous gluconate to participate in the whole crystallization course of zeolite. Multiple characterizations demonstrate that the tetrahedrally coordinated Fe atoms are selectively incorporated into the MFI siliceous zeolite framework (Fe-MFI). A catalytic test in propane dehydrogenation shows that the optimized Fe-MFI zeolite possesses high activity, propylene selectivity, and durability. This study opens an efficient strategy to incorporate isolated Fe atoms into the zeolite framework.
中文翻译:
通过一锅法合成将铁位点选择性结合到 MFI 沸石骨架中
开发高效的方法将活性金属位点选择性地结合到沸石骨架中对于金属沸石在包括烷烃转化在内的各种催化反应中的大规模利用至关重要。在此,葡萄糖酸亚铁被开发为一种有效的金属前体,可将 Fe 原子嵌入 MFI 硅质沸石骨架中。系统地研究了结晶时间和 Si/Fe 比。结果表明,葡萄糖酸亚铁在碱性条件下具有良好的溶解性和稳定性,使葡萄糖酸亚铁参与了沸石的整个结晶过程。多项表征表明,四面体配位的 Fe 原子被选择性地结合到 MFI 硅质沸石骨架 (Fe-MFI) 中。丙烷脱氢催化试验表明,优化后的 Fe-MFI 沸石具有高活性、丙烯选择性和耐久性。这项研究开辟了一种将孤立的铁原子并入沸石骨架的有效策略。
更新日期:2023-03-12
中文翻译:
通过一锅法合成将铁位点选择性结合到 MFI 沸石骨架中
开发高效的方法将活性金属位点选择性地结合到沸石骨架中对于金属沸石在包括烷烃转化在内的各种催化反应中的大规模利用至关重要。在此,葡萄糖酸亚铁被开发为一种有效的金属前体,可将 Fe 原子嵌入 MFI 硅质沸石骨架中。系统地研究了结晶时间和 Si/Fe 比。结果表明,葡萄糖酸亚铁在碱性条件下具有良好的溶解性和稳定性,使葡萄糖酸亚铁参与了沸石的整个结晶过程。多项表征表明,四面体配位的 Fe 原子被选择性地结合到 MFI 硅质沸石骨架 (Fe-MFI) 中。丙烷脱氢催化试验表明,优化后的 Fe-MFI 沸石具有高活性、丙烯选择性和耐久性。这项研究开辟了一种将孤立的铁原子并入沸石骨架的有效策略。