[1Aa01-11] 放射光表面科学部会「放射光による表面界面の先端的解析：基礎から応用まで」

[1Aa10Y] Real-time observation of hydrogen absorption in palladium-gold alloys by ambient-pressure X-ray photoelectron spectroscopy

*takanori koitaya^1,2, Susumu Yamamoto³, Iwao Matsuda⁴, Jun Yoshinobu⁴, Toshihiko Yokoyama¹ (1. Institute for Molecular Science, National Institutes of Natural Sciences, 2. JST PRESTO, 3. International Center for Synchrotron Radiation Innovation Smart, Tohoku University, 4. The Institute for Solid State Physics, The University of Tokyo)

Real-time observation of absorption and desoption processes of hydrogen in palladium-gold alloys was performed by means of ambient-pressure X-ray photoelectron spectroscopy. We succeeded AP-XPS measurements in the presence of nitrogen gas at a pressure of 100 mbar using a newly developed apertrure nozzle. With the improved apparatus, we conducted AP-XPS experiments of the Pd-Au alloys in hydrogen, and detected changes in the chemical states of Pd and Au in the alloys related to a metal-hydride phase transition.