Research into the correlation between surface degeneration layer control and hydrogen desorption temperature characteristic

Tode, Mayumi; Harries, J.; Teraoka, Yuden; Yoshigoe, Akitaka 

Thermal stability of native oxide layer on the hydrogen storage materials is related to the hydrogen absorption and desorption. In this study, thermal degradation process of native oxide layer on TiFe was observed by high resolution soft X-ray synchrotron radiation photoemission spectroscopy. All experiments have been conducted at the surface chemistry experimental station (SUREAC2000) at BL23SU, SPring-8. After thermal annealing, the peak that shows the oxidation weakens, and the peak that shows the metal strengthens. The thermal stability of a natural oxide layer was observed to stabilize by about 200 degrees by deuterium ion implanted.