TiO2纳米管限域PtPdAu催化剂的制备及其选择加氢性能

项目名称： TiO2纳米管限域PtPdAu催化剂的制备及其选择加氢性能

项目编号： No.21303210

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 杨旭

作者单位： 中国科学院广州能源研究所

项目金额： 25万元

中文摘要： 限域于有限纳微空间中的催化活性组元，由于量子效应而显示出独特的催化活性。开展二氧化钛纳米管限域Pt、Pd、Au复合催化剂的制备及其催化选择加氢的机理研究，可为生物质、石油、天然气等合成精细化工品工艺中的催化剂设计提供理论依据。本项目通过对水热合成钛酸纳米管外表面进行疏水改性，将Pt、Pd、Au内嵌于钛酸纳米管，进一步通过控制热处理工艺制备二氧化钛纳米管限域Pt、Pd、Au的复合催化剂。考察制备工艺条件对二氧化钛纳米管载体、活性组元Pt、Pd、Au及其合金化的组成、形貌、晶型等的影响。采用选择加氢（苯酚/不饱和烯醛选择加氢等）做模型评价体系，考察催化剂的加氢还原性能。在研究催化剂结构与催化活性之间关系的基础上，基于量子效应和限域电子效应，探讨限域空间内的Pt、Pd、Au的催化特性及其与二氧化钛纳米管载体之间的协同催化作用机理。

中文关键词： 限域；二氧化钛纳米管；铂钯金；选择加氢；催化

英文摘要： The nano catalyst exhibits excellent unique performance as the active component confined in the nano/micro space, due to the well-known quantum effect. Pt, Pd and Au mono or multi components confined in the TiO2 nanotube, are prepared and its catalysis towards selective hydrogenation transformation are studied as well. It could provide the basis theory for the design of catalysts in fine chemical transformation derived from bio-mass, petroleum, natural gas and so on. Firstly the Pt, Pd and/or Au components are introduced into the titania nanotube, then the titania nanotube is transformed into the well-crystallited titanium oxide (TiO2) nanotube via controllable thermal treatment, and then the novel catalyst with noble metal confined in TiO2 nanotube is obtained. The effect of preparation process on the composition, morphology and crystallite of TiO2 nanotube, as well as active component (Pt, Pd, Au or alloy) were comprehensively investigated. The performance of catalysts towards selective hydrogenation were evaluated by hydrogenation of phenol/unsatured aldehyde as model reaction. The relationship between the structure and activity are investigated. Based on the quantum effect and confined electronic effect, the synergetic mechanism between the active component and the TiO2 nanotube are explored.

英文关键词： confinement；TiO2 nanotubes；PtPdAu；selective hydrogenation；catalysis