MRI: Acquisition of Rocky Mountain Environmental X-ray Photoelectron Spectroscopy Facility for In Situ Characterization of Active Surfaces

MRI：购置落基山环境 X 射线光电子能谱设备，用于活性表面的原位表征

• 批准号: 1626619
• 负责人: Steven Decaluwe
• 金额: $ 57.65万
• 依托单位: Colorado School of Mines
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-10-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1626619&HistoricalAwards=false
• 关键词: MRI; Acquisition; Rocky; Mountain; Environmental

CBET - 1626619Decaluwe, StevenThis award will fund acquisition of an Environmental X-ray Photoelectron Spectrometer (E-XPS) to establish a unique regional facility for exploring behavior of material surfaces in operating and/or reactive environments and for training in advanced measurements at theColorado School of Mines (CSM) and collaborating institutions across the Rocky Mountain region. For many functional materials critical to our nation's energy and environmental future, performance depends on material surface properties during device operation, which can vary quite significantly from surface properties under conditions typically measured by standard high vacuum surface analysis tools. For this reason, the E-XPS user facility established by this award will enable new insights into in a diverse array of material-dependent technologies and scientific fields. This E-XPS center will significantly expand access for new and interested users across the Rocky Mountain Region in engineering, chemistry, geophysics, and other disciplines to employ E-XPS to study materials and surfaces in active environments. The instrument will be installed and established as a self-sustaining user facility at CSM to advance XPS capabilities in the region for both internal and external users. The established facility will provide world-class material science research and education experiences for the next generation of science and engineering leaders from CSM and elsewhere. The facility will advance students' knowledge of instrumentation, instrument capabilities, sample preparation, and data analysis relevant to their respective fields of study in undergraduate and graduate coursework and research activities.Heterogeneous interfaces play a critical role in many engineered processes and natural systems. Active surfaces mediate multi-phase chemical reactions, often instigate fracture or failure in materials or devices, and are very sensitive to local environments. Because surface properties under active conditions can deviate significantly from bulk properties, the inability for many researchers to study interfacial chemical states during device operation or in relevant ambient conditions presents a substantial barrier to fundamental scientific insight. The E-XPS will provide invaluable non-destructive evaluation of surface and near-surface states for materials and devices in real and operating environments, thereby overcoming the limitations of conventional, lab-based XPS at UHV conditions.The E-XPS user facility established by this award will allow measurements of solid-vapor and solid-liquid-vapor interfaces at pressures up to 25 mbar, temperatures up to 800°C, and can operate with electrochemical perturbation of non-equilibrated surfaces. These capabilities enable surface characterization in realistic chemical, electrochemical, and thermal environments for processes related to energy conversion, chemical processing, geochemistry, and materials degradation. The unit can measure lateral or depth profiles in a single spectrum, and can operate under standard XPS (i.e. UHV) conditions, thereby meeting a critical need at CSM.E-XPS has only recently expanded from heavily oversubscribed synchrotron-based user facilities to laboratory-scale instruments. This user facility will therefore greatly improve access and throughput for E-XPS capabilities, enabling groundbreaking and collaborative interdisciplinary materials research at CSM and at collaborating regional universities and federal research labs. Expected users from numerous engineering disciplines, physical sciences, and geological sciences will employ the E-XPS instrument to address outstanding questions about material surface behavior in arenas such as energy conversion technologies, geochemistry, environmental processes, and materials fabrication. It is further anticipated that technological implications of these unique measurements in active environments will draw in industrial users in these fields.

CBET-1626619迪卡卢韦，史蒂文该合同将资助购买环境X射线光电子能谱仪(E-XPS)，以建立一个独特的地区性设施，用于探索材料表面在运行和/或反应环境中的行为，并在科罗拉多矿业学院(CSM)和落基山脉地区的合作机构进行先进测量方面的培训。对于许多对我们国家的能源和环境未来至关重要的功能材料，性能取决于设备运行期间的材料表面属性，这些属性可能与通常由标准高真空表面分析工具测量的条件下的表面属性有很大差异。因此，该奖项建立的E-XPS用户设施将使人们能够对各种依赖材料的技术和科学领域有新的见解。这个E-XPS中心将极大地扩大落基山脉地区工程、化学、地球物理和其他学科的新用户和感兴趣的用户使用E-XPS研究活跃环境中的材料和表面的机会。该仪器将作为CSM的一个自给自足的用户设施安装和建立，以提高该地区内部和外部用户的XPS能力。建成的设施将为CSM和其他地方的下一代科学和工程领导人提供世界级的材料科学研究和教育经验。该设施将提高学生在本科和研究生课程和研究活动中与各自研究领域相关的仪器、仪器能力、样品制备和数据分析方面的知识。异质接口在许多工程过程和自然系统中发挥着关键作用。活性表面起着多相化学反应的调节作用，经常引发材料或器件的断裂或失效，并且对局部环境非常敏感。由于活性条件下的表面性质可能会显著偏离整体性质，因此许多研究人员无法研究设备运行过程中或相关环境条件下的界面化学状态，这对基础科学见解构成了实质性的障碍。E-XPS将为真实和运行环境中的材料和器件提供无价的表面和近表面状态的无损评估，从而克服在特高压条件下传统的基于实验室的XPS的限制。由该奖项建立的E-XPS用户设施将允许在压力高达25 mbar、温度高达800°C的情况下测量固-蒸气和固-液-蒸汽界面，并可以在非平衡表面的电化学扰动下操作。这些能力使其能够在真实的化学、电化学和热环境中对与能量转换、化学加工、地球化学和材料降解相关的过程进行表面表征。该设备可以在单个光谱中测量横向或深度剖面，并可以在标准XPS(即特高压)条件下运行，从而满足CSM的关键需求。因此，这一用户设施将极大地提高E-XPS功能的访问和吞吐量，使CSM以及合作的地区大学和联邦研究实验室能够进行开创性和协作性的跨学科材料研究。来自众多工程学科、物理科学和地质科学的预期用户将使用E-XPS仪器来解决能源转换技术、地球化学、环境工艺和材料制造等领域中有关材料表面行为的突出问题。进一步预计，这些独特的测量在活动环境中的技术影响将吸引这些领域的工业用户。