Author/Authors :
Ijima، نويسنده , , Kaoru and Koike، نويسنده , , Yuichiro and Chun، نويسنده , , Wang-Jae and Saito، نويسنده , , Yukinori and Tanizawa، نويسنده , , Yasuhiro and Shido، نويسنده , , Takafumi and Iwasawa، نويسنده , , Yasuhiro and Nomura، نويسنده , , Masaharu and Asakura، نويسنده , , Kiyotaka، نويسنده ,
Abstract :
The geometrical structure of a low coverage Ni species on an α-Al2O3 (0 0 0 1) single crystal surface has been studied using a polarization-dependent total reflection fluorescence extended X-ray absorption fine structure (PTRF-EXAFS) spectroscopy to reveal the bonding feature between the metal and the oxide surface. The Ni species on the α-Al2O3 (0 0 0 1) surface is atomically dispersed with a Ni–O distance at 0.198 ± 0.003 nm. The adsorption site is determined to be a threefold oxygen site on top of a deep Al atom accompanied with a relaxation of the nearest neighbor oxygen atoms.
