High Throughput Cycling Coupled XPS of Hydrogen Storage Materials

储氢材料的高通量循环耦合 XPS

• 批准号: 2283718
• 金额: --
• 依托单位: University of Nottingham
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2283718
• 关键词: Throughput; Cycling; Coupled; XPS; Hydrogen

X-ray photoelectron spectroscopy (XPS) is one of the most powerful techniques for studying the chemistry at the surface of materials. However, it can only operate under vacuum conditions, far from the cycling pressures of hydrogen storage materials. Even ambient pressure XPS (often referred to as high-pressure XPS) cannot ever reach these sorts of pressures. Instead, we will adopt a novel method for moving a sample between the ultra-high vacuum XPS chamber and a reaction chamber where the materials can be subjected to the hydrogen pressures and temperatures required for hydrogen storage to undergo one or more cycles. The sample is then rapidly returned to the XPS chamber to perform core-level measurements to determine any chemical changes. In this way we can explore degradation mechanisms, the effects of impurities, and other irreversible reactions. Because the material never leaves the instrument, changes can be directly correlated to the cycling process.

x射线光电子能谱（XPS）是研究材料表面化学的最有力的技术之一。然而，它只能在真空条件下运行，远离储氢材料的循环压力。即使是环境压力XPS（通常称为高压XPS）也无法达到这种压力。相反，我们将采用一种新颖的方法在超高真空XPS室和反应室之间移动样品，在反应室中，材料可以承受氢气储存所需的氢气压力和温度，以经历一个或多个循环。然后将样品迅速送回XPS室进行芯级测量以确定任何化学变化。通过这种方式，我们可以探索降解机制，杂质的影响，以及其他不可逆反应。因为材料永远不会离开仪器，所以变化可以直接与循环过程相关。