Unraveling Plasma-Assisted Catalysis: Toward Understanding Fundamental Molecule-Surface Interactions and Energy Partitioning Synergisms

揭示等离子体辅助催化：理解基本的分子-表面相互作用和能量分配协同作用

基本信息

批准号：
1803067
负责人：
Ellen Fisher
金额：
$ 35万
依托单位：
Colorado State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-09-01 至 2022-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1803067&HistoricalAwards=false
关键词：
Unraveling Plasma Assisted Catalysis Toward

项目摘要

The proposed project seeks to explore the fundamental chemistry occurring in low temperature plasmas (LTPs) used for plasma-assisted catalytic (PAC) processes designed to remove atmospheric pollutants. Plasmas contain a broad spectrum of reactive species that can work synergistically with a catalyst to enhance the overall elimination of contaminants such as nitrogen oxides (NOx) and volatile organic compounds (VOCs). The mechanisms for these cooperative actions, however, are not well understood. The proposed work will combine electronic structure calculations with multiple spectroscopic analysis tools to unravel the complexity of reactions occurring in this system. The proposed research will combine experimental and theoretical approaches to decipher energy partitioning and inter-twined reactions to elicit predictive outcomes. These studies are designed to illuminate key factors that address critical foundational science challenges associated with LTP processes, including determining how energy is partitioned in LTPs and how reactive species are formed in these systems. On a molecular level, the project seeks to determine how substrate architecture (including micro- and nanostructure) affects plasma-surface interactions as well as the mechanisms for plasma-substrate interactions. The proposed experiments will provide robust experimental data to improve computer models of relevant LTPs that currently rely on either incomplete data or extrapolated information for plasma properties. A key element is a comprehensive approach that connects gas-phase chemistry with molecule-surface interactions to elucidate the underlying chemistry in PAC systems with enhanced performance. Spatially- and temporally-resolved absorption and emission spectroscopies along with mass spectrometry will be used to probe dynamics, energy partitioning and synergisms among chemical processes in LTPs. Substrates and plasma processing systems selected for the proposed study are designed to improve performance of plasma-catalytic removal of atmospheric pollutants. The PI has a strong track record of mentoring groups traditionally underrepresented in STEM and is currently leading efforts to establish a cross-college, multidisciplinary School of Advanced Materials Discovery (SAMD) at Colorado State University. SAMD will house interdisciplinary degree programs and serve as an umbrella organization for materials-related education and outreach. Based on the proposed work, the PI and her trainees will further develop materials-focused kits for use in K-12 classrooms and demonstrations that emphasize materials chemistry and plasma processing.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.

拟议的项目旨在探索用于等离子体辅助催化（PAC）过程的低温等离子体（LTP）中发生的基本化学反应，旨在去除大气污染物。等离子体包含各种反应性物种，可以与催化剂协同作用，以增强污染物的总体消除，例如氮氧化物（NOX）和挥发性有机化合物（VOC）。然而，这些合作行动的机制尚未得到充分理解。提出的工作将将电子结构计算与多种光谱分析工具相结合，以揭示该系统中发生的反应的复杂性。拟议的研究将结合实验和理论方法，以破译能量分配和交叉反应，以引起预测结果。这些研究旨在阐明关键因素，以应对与LTP过程相关的关键基础科学挑战，包括确定LTP中的能量如何分配以及这些系统中的反应性物种的形成方式。在分子层面上，该项目旨在确定底物结构（包括微型和纳米结构）如何影响等离子表面相互作用以及质等质基底相互作用的机制。提出的实验将提供强大的实验数据，以改善相关LTP的计算机模型，这些LTP的计算机模型当前依赖于不完整的数据或针对等离子体属性的外推信息。一个关键要素是一种综合方法，将气相化学与分子表面相互作用联系起来，以阐明具有增强性能的PAC系统中的基本化学。在空间和时间上分辨的吸收和发射光谱以及质谱法将用于探测LTPS化学过程之间的动力学，能量分配和协同作用。旨在改善用于提高血浆催化污染物的血浆催化去除剂的性能的底物和血浆加工系统。 PI在STEM中传统上代表人数不足，并且目前正在领导着建立科罗拉多州立大学的跨学科，高级材料发现（SAMD）的努力。 SAMD将容纳跨学科学位课程，并担任与材料相关的教育和外展的伞组织。根据拟议的工作，PI和她的受训者将进一步开发以材料为中心的工具包，用于在K-12教室中使用，并强调材料化学和等离子体处理的演示。该奖项反映了NSF的法定任务，并被视为值得通过基金会的知识分子优点和更广泛的影响审查审查的审查标准来通过评估来获得支持。