Benkert A, Blum M, Meyer F, Wilks R G, Yang W, Bär M, Reinert F, Heske C, Weinhardt L
Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology (KIT), Hermann-v.-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
Department of Chemistry, University of Nevada, Las Vegas (UNLV), 4505 Maryland Parkway, Nevada 89154-4003, USA.
Rev Sci Instrum. 2014 Jan;85(1):015119. doi: 10.1063/1.4862059.
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.
我们展示了一种新型气室，其设计用于使用软X射线发射和吸收光谱学研究气体及气体/固体界面的电子结构。在该气室中，样品气体通过薄窗膜与分析室的真空隔开，从而能够在大气压下进行原位测量。气体温度可从室温调节至约600°C。为避免光束损伤，可维持恒定质量流量以持续更新气态样品。此外，该气室为固态样品提供了空间，能够研究高温下表面催化反应的气体/固体界面。为展示该气室的性能，我们研究了在大气压下氮气和氦气混合物后的TiO₂样品。
