Setup for in situ investigation of gases and gas/solid interfaces by soft x-ray emission and absorption spectroscopy.
Setup for in situ investigation of gases and gas/solid interfaces by soft x-ray emission and absorption spectroscopy.
复制标题
DOI：
10.1063/1.4862059
复制
发表时间：
2014-01
期刊：
影响因子：
--
通讯作者：
A. Benkert;M. Blum;F. Meyer;R. Wilks;W. Yang;M. Bär;F. Reinert;C. Heske;L. Weinhardt
中科院分区：
文献类型：
--
作者：
A. Benkert;M. Blum;F. Meyer;R. Wilks;W. Yang;M. Bär;F. Reinert;C. Heske;L. Weinhardt
我们提出了一种新的气体电池，设计用于研究气体和气体/固体界面的电子结构，使用软x射线发射和吸收光谱。在该细胞中，样品气体通过薄窗膜与分析室的真空分离，允许在大气压下进行原位测量。气体的温度可以从室温调节到大约600°C。为了避免光束损坏，可以保持恒定的质量流以不断刷新气体样品。此外，气体电池为固态样品提供了空间，允许在高温下研究表面催化反应的气/固界面。为了证明电池的能力，我们在常压下研究了氮气和He气体混合物后的TiO2样品。
We present a novel gas cell designed to study the electronic structure of gases and gas/solid interfaces using soft x-ray emission and absorption spectroscopies. In this cell, the sample gas is separated from the vacuum of the analysis chamber by a thin window membrane, allowing in situ measurements under atmospheric pressure. The temperature of the gas can be regulated from room temperature up to approximately 600 °C. To avoid beam damage, a constant mass flow can be maintained to continuously refresh the gaseous sample. Furthermore, the gas cell provides space for solid-state samples, allowing to study the gas/solid interface for surface catalytic reactions at elevated temperatures. To demonstrate the capabilities of the cell, we have investigated a TiO2 sample behind a mixture of N2 and He gas at atmospheric pressure.