RUI: The Role of Engineered Ligands in Putative Homogeneous Catalysis: Supporting a Homogeneous Catalyst or Modulating Nanoparticle Formation

RUI:工程配体在假定均相催化中的作用:支持均相催化剂或调节纳米颗粒形成

基本信息

  • 批准号:
    1956353
  • 负责人:
  • 金额:
    $ 23万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2020
  • 资助国家:
    美国
  • 起止时间:
    2020-05-01 至 2025-04-30
  • 项目状态:
    未结题

项目摘要

Emerging technologies such as the ability to convert carbon dioxide (CO2) into useful chemicals and the ability to use oxygen from the air as a reagent in chemical synthesis rely on catalysts that can speed up reaction rates and control which products are formed (selectivity). Catalysts can change structure and properties during a chemical reaction. The initial state of the catalyst may be known however, in general, far less is known about how catalysts might change over time under working conditions. Professor Margaret Scheuermann of Western Washington University is identifying and investigating catalysts structure while the catalyst is working. The team led by Professor Scheuermann is using both existing and newly developed techniques to characterize the resultant structures and understand their catalytic properties. The findings are giving insight into the role and significance of catalyst structure. The undergraduates and masters level students participating in this project are developing research skills that they will apply later as members of the STEM workforce. With funding from the Chemical Structure, Dynamics, and Mechanisms B (CSDM-B) Program of the Chemistry Division, Professor Margaret Scheuermann of Western Washington University is working to identify putative homogeneous catalytic systems in which nanoparticles are formed, characterize the particles, and attempt to discern whether the particles are an inactive decomposition product, a pre-catalyst/off-cycle species, or an active catalyst. The studies are focused on easily reduced late metals with highly engineered polydentate ligands that are known precatalysts for biomass deoxygenation, CO2 hydrogenation/formate dehydrogenation, and aerobic oxidation reactions. In addition to employing established tests for identifying and assessing nanoparticles in putative homogeneous catalysis, the Scheuermann group is developing new tests based on centrifugal forces and non-reactive polymers to gain insight as to whether the observed catalysis is best explained by solution chemistry (molecular species or small clusters), surfaces (bulk solid or nanoparticles), or a combination of the two.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
新兴技术,如将二氧化碳(CO2)转化为有用的化学品的能力,以及使用空气中的氧气作为化学合成试剂的能力,都依赖于催化剂,这些催化剂可以加快反应速率并控制形成的产物(选择性)。催化剂可以在化学反应过程中改变结构和性质。 催化剂的初始状态可能是已知的,然而,一般来说,对催化剂在工作条件下如何随时间变化知之甚少。西华盛顿大学的Margaret Scheuermann教授正在鉴定和研究催化剂工作时的催化剂结构。 由Scheuermann教授领导的团队正在使用现有和新开发的技术来表征所得结构并了解其催化性能。这些发现使人们深入了解催化剂结构的作用和意义。 参与该项目的本科生和硕士生正在开发研究技能,他们将在以后作为STEM劳动力的成员应用。在化学系化学结构、动力学和机理B(CSDM-B)项目的资助下,西华盛顿大学的Margaret Scheuermann教授正在研究确定形成纳米颗粒的假定均相催化体系,表征颗粒,并试图辨别颗粒是非活性分解产物、预催化剂/停止循环物种还是活性催化剂。这些研究集中在易于还原的晚期金属上,这些金属具有高度工程化的多齿配体,这些配体是已知的用于生物质脱氧、CO2加氢/甲酸脱氢和有氧氧化反应的预催化剂。除了使用已建立的测试来识别和评估假定的均相催化中的纳米颗粒外,Scheuermann小组正在开发基于离心力和非反应性聚合物的新测试,以深入了解所观察到的催化是否可以用溶液化学来解释(分子种类或小簇),表面(块状固体或纳米颗粒),该奖项反映了NSF的法定使命,并通过使用基金会的知识价值和更广泛的影响进行评估,被认为值得支持审查标准。

项目成果

期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
In Situ Generation of Catalytically Relevant Nanoparticles from a Molecular Pincer Iridium Precatalyst during Polyol Deoxygenation
  • DOI:
    10.1021/acscatal.0c03180
  • 发表时间:
    2021-01-15
  • 期刊:
  • 影响因子:
    12.9
  • 作者:
    Gitnes, Rachael M.;Wang, Maggie;Scheuermann, Margaret L.
  • 通讯作者:
    Scheuermann, Margaret L.
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Margaret Scheuermann其他文献

Margaret Scheuermann的其他文献

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