Collaborative Research: Structure Sensitive Surface Chemistry - Small Molecule Activation and Spillover

合作研究:结构敏感表面化学-小分子活化和溢出

基本信息

  • 批准号:
    2102140
  • 负责人:
  • 金额:
    $ 25.97万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2021
  • 资助国家:
    美国
  • 起止时间:
    2021-05-15 至 2025-04-30
  • 项目状态:
    未结题

项目摘要

In this collaborative research project funded by the Chemical Structure Dynamics and Mechanisms (CSDM-A) program of the National Science Foundation’s Chemistry Division, Professors Andrew Gellman (Carnegie Mellon University) and Charles Sykes (Tufts University) are studying the influence of the atomistic structure of metal surfaces on the rates of catalytically relevant surface reactions. It is well known that the rates and selectivities of chemical reactions occurring on metal surfaces are determined by catalyst surface structure. Ideally, the design of catalysts would identify surface structures that optimize the yield of desired products. However, it is experimentally challenging to map reactivity comprehensively across the many possible structures of a metal surface. Gellman and Sykes have developed a complementary set of tools to measure surface reaction kinetics and to image atomistic surface structure across hundreds of different surface orientations concurrently. These methods will be used to generate datasets that will be used by catalyst developers to design new and improved catalytic materials. Students working on this project are gaining valuable skills in the fields of surface chemistry, x-ray spectroscopy and scanning probe microscopy.Gellman and Sykes are using spherically curved Cu and Ag single crystals that expose hundreds of different Cu(hkl) and Ag(hkl) surfaces as sample libraries for the study of surface structure and reactivity. Gellman is using spatially resolved x-ray photoemission spectroscopy to measure the rates of isothermal adsorption and activation of small molecules such as O2, CO2 and CH3CH2OH on hundreds of different Cu(hkl) and Ag(hkl) surfaces in order to identify the most active surface orientations and the trends correlating reactivity with surface structure. Sykes is studying the structures of these surfaces before and after adsorption using scanning tunneling microscopy. In addition, Gellman and Sykes are conducting similar measurements on surfaces modified by isolated atoms of metals such as Ni, Pd, and Pt to create single atom alloy catalysts with well-defined surface structures. This work will inform efforts to develop predictive theoretical models for understanding structure sensitive catalytic surface chemistry. This project also tests our current understanding of the mechanism of spillover in catalysis. Ultimately, this project is expected to advance our collective understanding of catalysis science and our ability to design new or improve catalytic materials.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.
在这个由国家科学基金会化学部化学结构动力学和机制(CSDM-A)计划资助的合作研究项目中,Andrew Gellman教授(卡内基梅隆大学)和Charles Sykes教授(塔夫茨大学)正在研究金属表面的原子结构对催化相关表面反应速率的影响。众所周知,在金属表面上发生的化学反应的速率和选择性由催化剂表面结构决定。理想情况下,催化剂的设计将确定优化所需产物产率的表面结构。然而,它是实验上具有挑战性的映射反应全面跨越许多可能的结构的金属表面。Gellman和Sykes开发了一套互补的工具来测量表面反应动力学,并同时对数百种不同表面取向的原子表面结构进行成像。这些方法将用于生成数据集,催化剂开发人员将使用这些数据集来设计新的和改进的催化材料。Gellman和Sykes使用球形弯曲的Cu和Ag单晶,暴露数百个不同的Cu(hkl)和Ag(hkl)表面作为样品库,用于表面结构和反应性的研究。Gellman正在使用空间分辨X射线光电子能谱来测量小分子如O2,CO2和CH 3CH 2 OH在数百种不同Cu(hkl)和Ag(hkl)表面上的等温吸附和活化速率,以确定最活跃的表面取向和与表面结构相关的反应性趋势。Sykes正在使用扫描隧道显微镜研究吸附前后这些表面的结构。此外,Gellman和Sykes正在对由Ni、Pd和Pt等金属的孤立原子改性的表面进行类似的测量,以创建具有明确表面结构的单原子合金催化剂。这项工作将通知努力发展预测的理论模型,了解结构敏感的催化表面化学。这个项目也测试了我们目前对催化溢出机制的理解。最终,该项目有望提高我们对催化科学的集体理解,以及我们设计新的或改进催化材料的能力。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审查标准进行评估,被认为值得支持。

项目成果

期刊论文数量(1)
专著数量(0)
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Charles Sykes其他文献

Charles Sykes的其他文献

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{{ truncateString('Charles Sykes', 18)}}的其他基金

Collaborative Research: Beyond the Single-Atom Paradigm: A Priori Design of Dual-Atom Alloy Active Sites for Efficient and Selective Chemical Conversions
合作研究:超越单原子范式:双原子合金活性位点的先验设计,用于高效和选择性化学转化
  • 批准号:
    2334970
  • 财政年份:
    2024
  • 资助金额:
    $ 25.97万
  • 项目类别:
    Standard Grant
Collaborative Research: Structure Sensitive Surface Chemistry - Enantioselectivity on Chiral Surfaces
合作研究:结构敏感表面化学 - 手性表面的对映选择性
  • 批准号:
    1764270
  • 财政年份:
    2018
  • 资助金额:
    $ 25.97万
  • 项目类别:
    Continuing Grant
Understanding and Controlling Coupled Molecular Motion on Surfaces
理解和控制表面上的耦合分子运动
  • 批准号:
    1708397
  • 财政年份:
    2017
  • 资助金额:
    $ 25.97万
  • 项目类别:
    Continuing Grant
New methods for controlling molecular motion on surfaces
控制表面分子运动的新方法
  • 批准号:
    1412402
  • 财政年份:
    2014
  • 资助金额:
    $ 25.97万
  • 项目类别:
    Standard Grant
Collaborative Research: High Throughput Structure Sensitive Surface Chemistry
合作研究:高通量结构敏感表面化学
  • 批准号:
    1012307
  • 财政年份:
    2010
  • 资助金额:
    $ 25.97万
  • 项目类别:
    Standard Grant
CAREER: Investigating and Controlling Molecular Rotation on Surfaces
职业:研究和控制表面分子旋转
  • 批准号:
    0844343
  • 财政年份:
    2009
  • 资助金额:
    $ 25.97万
  • 项目类别:
    Continuing Grant
Collaborative Research: The Structure and Chemistry of Naturally Chiral Metal Surfaces
合作研究:天然手性金属表面的结构和化学
  • 批准号:
    0717978
  • 财政年份:
    2007
  • 资助金额:
    $ 25.97万
  • 项目类别:
    Continuing Grant

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