金属（Sn、Ti、Zr等）改性沸石分子筛催化剂在葡萄糖的异构化与转化方面表现出较高的反应活性，这对生物质资源的高效转化利用具有重要意义。但是对于金属改性分子筛活性中心的具体种类、结构与性能以及葡萄糖的活化转化机制尚不清楚。本项目拟制备Sn等金属改性的分子筛催化剂，通过不同方式构筑金属活性中心。采用固体NMR结合其他实验技术（ESR、FT-IR、Raman、UV-vis等），对催化剂的活性中心进行表征，阐明活性位点的微观结构。研究葡萄糖异构化催化反应性能，探索提高催化活性与选择性的关键控制因素。通过原位NMR技术跟踪13C标记葡萄糖在催化剂上的反应过程，原位捕获反应吸附态物种与反应中间体，研究吸附物种及中间体的结构与化学性质，揭示反应机理，为新型高效催化剂的设计提供理论依据。

It was reported that the metal (Sn, Ti, Zr, etc.) modified zeolites exhibit exceptionally high catalytic activity toward the isomerization and conversion of glucose. However, the detailed structure of active site and the reaction mechanism of glucose conversion are still not well-understood. Metal active sites (Sn etc.) will be designed on zeolites catalysts using various modification methods. Solid-state NMR in conjunction with other techniques (FT-IR, ESR, Raman, UV-vis, etc.) will be employed in characterization of the active sites. The reactivity of these catalysts in glucose conversion will be studied, in order to clarify the key factors that determine the preparation of catalysts with high activities and selectivity. The reaction pathway of glucose conversion will be traced by 13C in-situ solid state NMR technique which can be used to capture the surface adsorbate and reaction intermediate. The structure and reactivity of these species will be determined. This may be helpful not only for understanding the reaction mechanism of glucose conversion but also for rational design of new highly efficient catalysts for the conversion of glucose.