Design and in situ Characterization of High-Surface Area Metallic and Bimetallic Nanoscale Catalysts

高比表面积金属和双金属纳米催化剂的设计和原位表征

• 批准号: RGPIN-2020-05418
• 负责人: Scott, Robert
• 金额: $ 3.5万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=748086
• 关键词: Design; situ; Characterization; Surface; Area

The proposed research involves the use of materials chemistry toward the rational design of nanoparticle catalysts for selective oxidation and hydrogenation reactions. Catalyst design will be undertaken to improve activity and stability of nanoparticle catalysts, as well as improving catalyst selectivity by spatially isolating catalytic sites or by control of substrate access to nanoparticle surfaces. In addition, in situ characterization of both nanoparticle design and nanoparticle catalysis will be carried out by X-ray absorption spectroscopy at the nearby Canadian Light Source using specialized cells which have been developed for liquid and gas phase work. Our long-term goal in this field is to develop catalysts which have high catalytic activity, excellent selectivity towards specific substrates, and excellent catalyst longevity and recyclability. Thus we will be developing sustainable catalytic materials which can minimize waste of hazardous materials and solvents, and attain a high atom economy for expensive noble metal catalysts. Specifically three directions will be pursued as a means of designing nanoparticle catalysts directed towards specific applications. These directions include a) the synthesis of atom-precise metallic and bimetallic clusters for stable and selective hydrogenation and oxidation catalysts; b) galvanic reductions of catalytic metals onto metal oxide nanoparticle supports, and c) the synthesis and characterization of porous nanoparticle catalysts via dealloying of nanoparticles and using the interior cavities of such nanoparticles to accelerate catalytic reactions. The proposed research is of importance to Canada as it will allow for the design of catalysts which can increase the efficiency of petrochemical processes and will lead to the generation of HQP who have skill-sets in the synthesis, characterization, and applications of nanoscale materials for sustainable chemistry and catalytic processes. Nanotechnology and sustainable chemistry promises to bring tremendous benefits to Canadian sectors such as the petrochemical and materials industry.

拟议的研究涉及使用材料化学对选择性氧化和加氢反应的纳米粒子催化剂的合理设计。将进行催化剂设计以提高纳米颗粒催化剂的活性和稳定性，以及通过空间隔离催化位点或通过控制基底进入纳米颗粒表面来提高催化剂选择性。此外，纳米粒子设计和纳米粒子催化的原位表征将在附近的加拿大光源使用专门的细胞，已开发的液相和气相工作的X射线吸收光谱法进行。我们在这一领域的长期目标是开发具有高催化活性、对特定底物具有优异选择性以及优异催化剂寿命和可回收性的催化剂。因此，我们将开发可持续的催化材料，可以最大限度地减少有害材料和溶剂的浪费，并实现昂贵的贵金属催化剂的高原子经济性。 具体地，将追求三个方向作为设计针对特定应用的纳米颗粒催化剂的手段。这些方向包括a）合成用于稳定和选择性氢化和氧化催化剂的原子精确的金属和金属簇; B）将催化金属电还原到金属氧化物纳米颗粒载体上，以及c）通过纳米颗粒的去合金化和使用这种纳米颗粒的内腔来加速催化反应来合成和表征多孔纳米颗粒催化剂。 拟议的研究对加拿大很重要，因为它将允许设计催化剂，从而提高石化工艺的效率，并将导致产生具有纳米材料合成、表征和应用技能的HQP，以实现可持续发展化学和催化过程。纳米技术和可持续化学有望为加拿大的石化和材料工业等部门带来巨大利益。