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 - 1626619Decaluwe，史蒂文该奖项将资助购买环境 X 射线光电子能谱仪 (E-XPS)，以建立一个独特的区域设施，用于探索操作和/或反应环境中材料表面的行为，并在科罗拉多学校进行高级测量培训对于许多对我们国家能源和环境未来至关重要的功能材料来说，其性能取决于设备运行期间的材料表面特性。与通常使用标准高真空表面分析工具测量的条件下的表面特性有很大差异，因此，该奖项建立的 E-XPS 用户设施将为各种依赖于材料的技术和科学领域提供新的见解。该 E-XPS 中心将显着扩大落基山脉地区工程、化学、地球物理学和其他学科的新用户和感兴趣的用户使用 E-XPS 来研究活跃环境中的材料和表面的机会。建立为一个自我维持的用户设施该设施将为 CSM 和其他地方的下一代科学和工程领导者提供世界一流的材料科学研究和教育经验。本科生和研究生课程作业和研究活动中与其各自研究领域相关的仪器知识、仪器功能、样品制备和数据分析。异质界面在许多工程过程和自然系统中发挥着关键作用。反应，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，因为活性条件下的表面特性可能与整体特性有很大偏差，因此许多研究人员无法研究器件运行期间或相关环境条件下的界面化学状态。 E-XPS 将为真实和操作环境中的材料和设备的表面和近表面状态提供宝贵的无损评估，从而克服 UHV 条件下传统实验室 XPS 的局限性。 E-XPS 用户设施建立该奖项将允许在高达 25 mbar 的压力、高达 800°C 的温度下测量固-汽和固-液-汽界面，并且可以在非平衡表面的电化学扰动下进行操作，这些功能可以实现真实的表面表征。适用于与能量转换、化学加工、地球化学和材料降解相关的化学、电化学和热环境。该装置可以测量单个光谱中的横向或深度剖面，并且可以在标准 XPS 下运行。 （即特高压）条件，从而满足 CSM 的关键需求。E-XPS 最近才从严重超额使用的基于同步加速器的用户设施扩展到实验室规模的仪器，因此，该用户设施将大大提高 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突破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 仪器来解决突出问题。有关能源转换技术、地球化学、环境过程和材料制造等领域中材料表面行为的问题，预计这些独特测量在活跃环境中的技术影响将吸引这些领域的工业用户。