A Facility for Ambient Pressure Photoelectron Spectroscopy (APPES) (R)

常压光电子能谱 (APPES) (R) 设施

• 批准号: EP/K004913/1
• 负责人: David Payne
• 金额: $ 39.89万
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2012
• 资助国家: 英国
• 起止时间: 2012 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FK004913%2F1
• 关键词: Facility; Ambient; Pressure; Photoelectron; Spectroscopy

For over 50 years, x-ray photoelectron spectroscopy (XPS) has demonstrated itself as an invaluable technique in the study of filled electronic states of solids, as well helping to determine the nature of interactions between solid surfaces and molecular species. Unfortunately there is one main drawback in the technique, that being that typical XPS measurements are performed in ultra high vacuum (UHV) conditions (10-10 mbar), due to the need of minimising the chances of unfavourable collisions occurring before the excited photoelectrons reach the energy analyser. Due to this restraint, studying the surfaces of technologically important materials occurs at a pressure many orders of magnitude lower than the operational conditions of the systems themselves (1-50 bar). Bridging this so-called "Pressure Gap" has remained a significant technological challenge. Very recent developments in electron energy analyser and sample holder design have for the first time allowed photoelectron spectroscopic measurements to be performed in ambient pressures of up to 25 mbar. The opportunity to study "real" surfaces in-situ and in-operando is a step change in the field of photoelectron spectroscopy, and opens a new and vital chapter in the area of surface science.The ambient pressure photoelectron spectroscopy (APPES) system is a state-of-the-art laboratory-based instrument with capabilities of performing high-energy resolution, low signal-to-noise photoemission measurements in up to 25 mbar ambient pressure with a number of different gases (O2, N2, H2, ethylene, acetylene). The instrument is equipped with a monochromated x-ray source and a high transmission, differentially pumped electron energy analyser. The system is fitted with an in-situ sample cell, which can provide a temperature range of 80 - 1100 K in the ambient atmospheres, permitting in-operando measurements. This specially designed modular in-situ cell, which is fully retractable from the analysis chamber, also allows standard UHV XPS comparative measurements to be performed with ease.The APPES instrument based at the Department of Materials, Imperial College London will be highly multidisciplinary, covering five broad research themes (i) Energy; (ii) Catalysis; (iii) Electronic Materials; (iv) Biomaterials; (v) Environmental and Heritage Science. The instrument, while hosted at Imperial is engaged in highly collaborative research at a regional, national (including the Diamond Light Source) and international level, with access arrangements also provided through coordination the National XPS Facility (NEXUS) at the University of Newcastle. This new approach to providing wide- reaching access will allow the APPES technique to be fully exploited and generate world-leading cutting edge scientific output.

50 多年来，X 射线光电子能谱 (XPS) 已证明自己是研究固体填充电子态的宝贵技术，并且有助于确定固体表面与分子物种之间相互作用的性质。不幸的是，该技术有一个主要缺点，即典型的 XPS 测量是在超高真空 (UHV) 条件（10-10 mbar）下进行的，因为需要最大限度地减少受激光电子到达之前发生不利碰撞的机会能量分析仪。由于这种限制，研究技术上重要的材料的表面是在比系统本身的操作条件（1-50巴）低许多数量级的压力下进行的。弥合这种所谓的“压力差距”仍然是一项重大的技术挑战。电子能量分析仪和样品架设计的最新发展首次允许在高达 25 mbar 的环境压力下进行光电子能谱测量。原位和在操作中研究“真实”表面的机会是光电子能谱领域的一个阶跃变化，并在表面科学领域开启了新的重要篇章。环境压力光电子能谱（APPES）系统是一款最先进的基于实验室的仪器，能够在高达 25 mbar 的环境压力下使用多种不同的气体（O2、N2、H2、乙烯、乙炔）。该仪器配备了单色 X 射线源和高透射率、差动泵浦电子能量分析仪。该系统配备了原位样品池，可在环境大气中提供 80 - 1100 K 的温度范围，从而允许进行现场测量。这种专门设计的模块化原位单元可从分析室中完全伸缩，还可以轻松执行标准 UHV XPS 比较测量。位于伦敦帝国理工学院材料系的 APPES 仪器将是高度多学科的，涵盖五个广泛的研究主题 (i) 能源； (二) 催化作用； (iii) 电子材料； (四) 生物材料； (v) 环境和遗产科学。该仪器在帝国理工学院主办，致力于区域、国家（包括钻石光源）和国际层面的高度协作研究，并通过纽卡斯尔大学国家 XPS 设施 (NEXUS) 的协调提供访问安排。这种提供广泛访问的新方法将使 APPES 技术得到充分利用并产生世界领先的尖端科学成果。

项目成果

The influence of oxygen on the surface interaction between CO2 and copper studied by ambient pressure X-ray photoelectron spectroscopy

常压X射线光电子能谱研究氧对CO2与铜表面相互作用的影响

• DOI: http://dx.10.1016/j.susc.2018.06.004
• 发表时间: 2018
• 期刊: Surface Science
• 影响因子: 1.9
• 作者: Regoutz A

PdIn intermetallic nanoparticles for the Hydrogenation of CO2 to Methanol

PdIn 金属间纳米粒子用于 CO2 加氢制甲醇

• DOI: 10.1016/j.apcatb.2017.07.069
• 发表时间: 2024-09-13
• 期刊: Applied Catalysis B-environmental
• 影响因子: 22.1
• 作者: Andrés García;A. Regoutz;E. White;D. Payne;M. Shaffer;Charlotte K. Williams
• 通讯作者: Charlotte K. Williams

Laboratory-based high pressure X-ray photoelectron spectroscopy: A novel and flexible reaction cell approach.

基于实验室的高压 X 射线光电子能谱：一种新颖且灵活的反应池方法。

• DOI: http://dx.10.1063/1.4975096
• 发表时间: 2017
• 期刊: The Review of scientific instruments
• 作者: Kerherve G

Increased photoelectron transmission in High-pressure photoelectron spectrometers using "swift acceleration"

使用“快速加速”增加高压光电子能谱仪中的光电子传输

• DOI: 10.1016/j.nima.2015.02.047
• 发表时间: 2015-06-11
• 期刊: Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
• 影响因子: 1.4
• 作者: M. Edwards;P. Karlsson;S. Eriksson;M. Hahlin;H. Siegbahn;H. Rensmo;J. Kahk;I. Villar;D. Payne;John Åhlund
• 通讯作者: John Åhlund

A study of the pressure profiles near the first pumping aperture in a high pressure photoelectron spectrometer

高压光电子能谱仪第一泵浦孔径附近压力分布的研究

• DOI: http://dx.10.1016/j.elspec.2015.08.005
• 发表时间: 2015
• 期刊: Journal of Electron Spectroscopy and Related Phenomena
• 影响因子: 1.9
• 作者: Kahk J