Hydrogen Gas Flow Cell for In Situ/Operando X-Ray Spectroscopic Studies
The hydrogen gas flow cell enables in situ/in operando X-ray spectroscopic studies at the Advanced Light Source (ALS) of solid-state hydrogen storage materials. Its design allows air- and water-sensitive samples to be used, enabling the in situ study of material properties and kinetics during H2 adsorption and desorption processes. X-ray spectroscopy can be used to monitor the electronic structure changes during hydrogen uptake and desorption. Samples can be exposed to H2 pressures up to 1 bar and temperatures from ambient to 300°C are feasible. The cell was built and commissioned on BL22.214.171.124 (ISAAC end station) and BL8.0.1 (Wet-RIXS endstation) at the ALS. Test experiments have been performed using Mg nanoparticles with a graphene capping layer (synthesized by HyMARC team members at Lawrence Berkeley National Laboratory)1 and NaAlH4 and Ti doped NaAlH4 (prepared by HyMARC team members at Sandia National Laboratories). In addition to use at the ALS, the cell is compatible with other synchrotron facilities, including SSRL, NSLS-II, and APS, allowing one to obtain a comprehensive picture of the electronic structure and its relationship to observed physical and chemical phenomena of hydrogen storage materials.2
On line and available for use in collaboration with HyMARC.
- S. Cho, A. M. Ruminski, S. ALoni, Y.-S. Liu, J. Guo, and J. J. Urban, Nat. Comm. DOI: 10.1038/ncomms10804.
- Y.-S. Liu, P.-A. Glans, C.-H. Chuang, M. Kapilashrami, and J. Guo, J. Electron Spectroscopy Related Phenom. 200 (2015): 282.