α,β-不饱和醛的C=O键高效选择加氢制不饱和醇一直是催化领域渴望实现的过程，由于分子中存在热力学有利的C=C键，使得C=O的选择活化与转化难度很大，成为多相催化领域的挑战课题。本项目拟从H2、不饱和醛分子的异位活化为切入点，构建梯级孔道的双层核壳结构Pt@ZIF@ZIF催化新材料，以丁烯醛加氢为探针反应，利用双壳层的分子择形效应、Pt与ZIF（咪唑类配体连接的金属有机骨架材料）强的相互作用、对C=O键优先吸附活化特征，避免C=C键的吸附与转化。通过改变制备方法、咪唑配体以及金属前驱物，调控Pt的颗粒尺寸、双壳层的孔道结构和结点（MNx）的性质；探索材料的制备科学与微观催化机制，以原位动态表征技术探究H2解离活化、传输的本质和丁烯醛C=O键转化的反应路径，从而形成丁烯醛选择加氢催化新体系，为开发具有应用前景的α,β-不饱和醛制不饱和醇催化新材料提供理论指导与技术支撑。

The selective hydrogenation of α,β-unsaturated aldehyde to form unsaturated alcohol is a desire process in catalysis field. The challenge for C=O hydrogenation arises from the existence of thermodynamic favorable C=C in one molecule. In this proposal, we will construct a kind of novel catalytic materials of dual-layered core-shell Pt@ZIF@ZIF for using crotonaldehyde hydrogenation as probe reaction based on the difference-sites activation of H2 and C=O bond. Because ZIF shell has shape-selective, the strong interaction between Pt and ZIF and prior adsorption of C=O, the adsorption and conversion of C=C will be avoided. The particles size of Pt, structure of dual-shell and nodes (MNx) ability will be regulated by alteration of imidazole linker and the metal precursor, and using different synthesis method. The preparation science and micro-catalytic mechanism of dual-layered core-shell Pt@ZIF@ZIF will be explored, while the relationships between the structure and catalytic performance will be established. Moreover, we will find out the fabrication laws of multiple-level porous structure and investigate the nature of activation-dissociation-transformation of H2 as well as the pathway of crotonaldehyde conversion by serials of in-situ characterizations, in order to form the novel catalytic system for crotonaldehyde hydrogenation and finally provide the academic guidance and technical support for developing new catalytic materials with wide application in unsaturated alcohol synthesis.