Presentation Information
[2P21]Development of solid-liquid interface TREXS (total reflection x-ray spectroscopy) and measurement of Fe, Ni K-edges at interface of water/SAE304
*Hitoshi Abe1,2,3, Yasuhiro Niwa1,2, Masao Kimura1,2 (1. Institute of Materials Structure Science (IMSS), High Energy Accelerator Research Organization (KEK), 2. The Graduate University for Advanced Studies (SOKENDAI), 3. Graduate School of Science and Engineering, Ibaraki University)
Surfaces and interfaces are the places where important chemical reactions occur. Many methods have been applied to study them. However, kinetics and behaviours at interfaces are still unclear. It is required to observe chemical states and local structures with an appropriate interface sensitivity and reasonable temporal resolution. X-ray absorption fine structure (XAFS) can be a method to overcome these issues, but is fundamentally bulk sensitive. We have presented a surface-sensitive XAFS-based method, named Total REflection X-ray Spectroscopy (TREXS). A simple and easy way to utilise TREXS is direct processing of near edge regions of TREXS spectra to track chemical reactions. TREXS has been developed further to study solid-liquid interfaces. A solid-liquid interface of stainless steel under water was observed as trial measurements. Wide energy range TREXS spectra including Fe and Ni K-edges were clearly obtained. This method can be applied to monitor chemical reactions at interfaces.