金属负载沸石分子筛催化剂在C5-C6糖类分子向糠醛类平台化合物转化反应中表现出较高的反应活性，对生物质资源的高效转化利用具有重要意义。但是对于金属负载分子筛活性中心的具体结构与性能以及C5-C6糖类转化机制尚不清楚。本项目拟通过不同方式构筑金属Sn、Ti和Zr负载的分子筛催化剂，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，阐明活性位的微观结构。研究C5-C6糖类分子向糠醛类平台化合物转化的反应性能，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C5-C6糖类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依据。

Metal-modified zeolites exhibit exceptionally high catalytic activity toward the conversion of C5-C6 sugars to furfural platform chemicals. However, the detailed structure of active sites and reaction mechanism are still not well-understood. Metal Sn, Ti and Zr active sites will be constructed on zeolites catalysts using various preparation methods. Solid-state NMR in combination with other spectroscopic techniques (ESR, FT-IR, Raman, UV-vis, etc.) will be employed to characterize the structure of active sites. The reactivity of these catalysts in C5-C6 sugars 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 C5-C6 sugars conversion to furfural platform chemicals will be monitored by 13C in-situ solid state NMR technique in order to capture the surface adsorbates and reaction intermediates. The structure and property relationship of the metal-modified zeolites will be revealed, which is helpful not only for understanding the reaction mechanism of C5-C6 sugars conversion but also for rational design of highly efficient catalysts for biomass conversion.