Supported multimetallic nanoparticles containing mixed oxidation states as catalysts

含有混合氧化态的负载型多金属纳米颗粒作为催化剂

• 批准号: 2102957
• 金额: --
• 依托单位: CARDIFF UNIVERSITY
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2102957
• 关键词: Supported; multimetallic; nanoparticles; containing; mixed

The chemicals market requires increased product specificity (lower levels of waste products) from its processes as well as the ability to process lower purity feedstocks. These aims of increased feedstock flexibility coupled with increased product specificity presents an enormous technical challenge. This collaborative project between the CCI and JM allows access to a unique combination of skills and equipment that enables this challenge to be addressed since together the CCI and JM have extensive experience to make novel and controlled gold containing supported bi-metallic nanoparticle structured materials with controlled morphology (core-shell / homogeneous alloys). These synergistic effects often give materials displaying high catalyst reactivity. This project will extend this principle to develop materials in which one metal is in a high oxidation state and the other in a low oxidation rather than being metallic. In particular, the aim of this project is to prepare supported metal nanoparticles in which gold is in a low oxidation state as a chloride or stabilised with other hard and soft ligands, and the second metal (copper, nickel) are in high oxidation states and to evaluate their activity when supported on inorganic oxides or activated carbon. The catalysts will be tested for selective oxidation, H2O2 synthesis and acetylene hydrochlorination to generate insights into the structure-activity relationships as well as methodologies to stabilise these and similar novel materials.The aim is to develop and utilise new synthesis procedures to allow the controlled synthesis of new nanoparticle structures such as alloy (metallic) cores with shells consisting of metals in high oxidation states, or low oxidation metallic shells around oxidic cores and even developing layered nanomaterials with concentric multiple shells containing oxide and metallic layers. These novel nanostructures will then be characterised and evaluated as catalysts and provide the basis of a new class of catalysts.

化学品市场要求其工艺具有更高的产品特异性（更低水平的废物）以及处理低纯度原料的能力。这些增加原料灵活性与增加产品特异性的目标提出了巨大的技术挑战。CCI和JM之间的这个合作项目允许获得独特的技能和设备组合，使这一挑战得以解决，因为CCI和JM在制造具有受控形态的新型和受控含金支撑双金属纳米颗粒结构材料（核壳/均质合金）方面拥有丰富的经验。这些协同效应通常使材料显示出高催化剂反应性。该项目将扩展这一原则，以开发一种金属处于高氧化态而另一种金属处于低氧化态而不是金属的材料。特别是，该项目的目的是制备负载的金属纳米颗粒，其中金处于低氧化态，作为氯化物或与其他硬和软配体稳定，第二种金属（铜，镍）处于高氧化态，并评估其活性时，负载在无机氧化物或活性炭。这些催化剂将用于选择性氧化、H2 O2合成和乙炔氢氯化，以深入了解结构-活性关系以及稳定这些和类似新材料的方法。目的是开发和利用新的合成程序，以控制合成新的纳米颗粒结构，如合金具有由高氧化态金属组成的壳的（金属）核，或围绕氧化核的低氧化金属壳，甚至开发具有包含氧化物和金属层的同心多壳的层状纳米材料。这些新的纳米结构将作为催化剂进行表征和评估，并为一类新的催化剂提供基础。