A Combined NMR and Diffraction Approach to Study Pd Metal Nanoparticles Used in Industrial Catalysis

核磁共振和衍射相结合的方法研究工业催化中使用的钯金属纳米颗粒

• 批准号: 2271089
• 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: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2271089
• 关键词: Combined; NMR; Diffraction; Approach; Study

Warwick Supervisor: Assoc. Prof. John V. Hanna, Department of Physics, University of WarwickIndustrial Supevisor: Dr Peter T. Bishop, Johnson Matthey Technology Centre, Sonning CommonAn ability to clearly relate local (short range) structure to the function of any material is a critical feature for any catalytic system. The accessible Pd oxidation states, its flexibility of handling and relatively lower cost in comparison to other precious metals makes Pd a viable option in many catalytically driven industrial and technological processes. The most prominent catalytic applications of Pd metal involve its utilisation in the hydrogenation reactions of fatty acids, the cracking of petrochemical systems, and the NOx/SOx reduction and the abatement of other Greenhouse gas emissions in automotive car exhaust catalytic converters.This project represents development of the 105Pd solid state NMR technique, and its implementation towards the study of Pd metal nanoparticle systems that are key to these catalytically-driven industrial and environmental processes. The very large 105Pd quadrupole parameters and the Knight shift (Kiso) are very sensitive probes of the small structural distortions within the Pd nanoparticle structure; these structural features will be correlated with the electronic structure and overall catalytic activity of the system. Many surprising observations are able to be elucidated from the 105Pd NMR technique, which appear to conflict with the longer range averaged information derived from diffraction techniques. In this project, the combined use of short range (105Pd solid state NMR) and longer range (XRD/neutron diffraction) techniques, in conjunction with other materials characterisation techniques (vibrational spectroscopies, etc.) will be used to study Pd nanoparticle systems such as Pd sponge, Pd black and organically capped/stabilised Pd nanoparticles to assess the real bulk and surface-like structural characteristics that influence catalytic activity. To compliment these project activities, the PhD student will spend a significant proportion of time interacting with the industrial sponsor (Johnson Matthey) to understand the production processes and measurement of catalytic activity.A full 3.5 year UK Research Council (EPSRC) PhD studentship is available for this project, open to home/EU candidates. Furthermore, there will be an option available for this student to enter the Warwick/NTU (Singapore) Joint PhD Programme where a 12-18 month portion of the 4 year studentship will be spent in a student exchange with NTU School of Materials Science & Engineering. This option would lead to the award of a joint PhD degree between these participating Institutions.

沃里克主管：副教授。 John V. Hanna 教授，华威大学物理系工业主管：Peter T. Bishop 博士，Johnson Matthey 技术中心，Sonning Common 将局部（短程）结构与任何材料的功能清楚地联系起来的能力是任何催化系统的关键特征。与其他贵金属相比，钯的易氧化态、处理灵活性和相对较低的成本使钯成为许多催化驱动的工业和技术过程中的可行选择。钯金属最突出的催化应用涉及其在脂肪酸加氢反应、石化系统裂解、汽车尾气催化转换器中减少 NOx/SOx 和减少其他温室气体排放等方面的应用。该项目代表了 105Pd 固态 NMR 技术的发展，及其在关键的 Pd 金属纳米颗粒系统研究中的应用 这些催化驱动的工业和环境过程。非常大的 105Pd 四极参数和奈特位移 (Kiso) 是 Pd 纳米颗粒结构内微小结构扭曲的非常敏感的探针；这些结构特征将与系统的电子结构和整体催化活性相关。 105Pd NMR 技术能够阐明许多令人惊讶的观察结果，这似乎与衍射技术得出的较长距离平均信息相冲突。在该项目中，结合使用短程（105Pd固态NMR）和长程（XRD/中子衍射）技术，结合其他材料表征技术（振动光谱等），将用于研究Pd纳米粒子系统，例如Pd海绵、Pd黑和有机封端/稳定的Pd纳米粒子，以评估真实的体积和表面结构 影响催化活性的特征。为了补充这些项目活动，博士生将花费大量时间与工业赞助商（庄信万丰）互动，以了解生产过程和催化活性的测量。该项目提供完整的 3.5 年英国研究委员会 (EPSRC) 博士生奖学金，向国内/欧盟候选人开放。此外，该学生还可以选择进入华威大学/南洋理工大学（新加坡）联合博士项目，四年制学生的 12-18 个月部分将用于与南洋理工大学材料科学与工程学院进行学生交换。这一选择将导致这些参与机构之间授予联合博士学位。