Solid State NMR Studies of Heterogeneous Alumina, Silica and Titania Supported Pt Nanoparticle Catalyst Systems

非均相氧化铝、二氧化硅和二氧化钛负载 Pt 纳米颗粒催化剂体系的固态核磁共振研究

• 批准号: 1939219
• 金额: --
• 依托单位: University of Warwick
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1939219
• 关键词: Solid; State; NMR; Studies; Heterogeneous

The structure-function relationship of heterogeneous catalyst systems for hydrogenation reactions is often underpinned by the interaction of the precious metal catalyst nanoparticle with its support material. Using a multinuclear solid state NMR approach, this study seeks to explore the catalyst-support interaction prior to and after the reduction of the metal oxide catalyst in situ on the support material. A large range of these systems has been manufactured using conventional techniques where the catalytic metal species are mounted on oxide supports via nitrate solution deposition, and the reduction of these metal species with increasing temperature produces metal oxide nanoparticles, and then eventually metal nanoparticles interacting/bonding with the oxide support material. Solid state NMR is a short-range technique which is particularly suited to studying disordered systems and small nanoparticle systems with reduced translational symmetry. This project will focus on platinum oxide (and nickel oxide) particle deposition, with the 195Pt nucleus providing an excellent probe of the metal speciation formed; the support materials will be studied using conventional 29Si MAS, 27Al MAS, and 49Ti static NMR techniques. This project will be undertaken in conjunction with industrial partners (Johnson Matthey) who are one of the world leading catalyst producing companies.

加氢反应非均相催化剂体系的结构-功能关系通常由贵金属催化剂纳米颗粒与其载体材料的相互作用支撑。本研究采用多核固态核磁共振方法，旨在探索金属氧化物催化剂在载体材料上原位还原之前和之后的催化剂-载体相互作用。大量的此类系统是使用传统技术制造的，其中催化金属物质通过硝酸盐溶液沉积安装在氧化物载体上，并且这些金属物质随着温度升高而还原，产生金属氧化物纳米颗粒，然后最终金属纳米颗粒与氧化物载体材料相互作用/结合。固态核磁共振是一种短程技术，特别适合研究无序系统和平移对称性降低的小纳米粒子系统。该项目将重点关注氧化铂（和氧化镍）颗粒沉积，195Pt 核为所形成的金属形态提供了良好的探针；将使用传统的 29Si MAS、27Al MAS 和 49Ti 静态 NMR 技术研究支撑材料。该项目将与工业合作伙伴（庄信万丰）联合开展，工业合作伙伴是世界领先的催化剂生产公司之一。