- 期刊
- OpenAccess
A Study of Pt(110) Surface Reconstruction and Oxygen-Chemisorption
並列摘要
Using sputtering by Ar ions of low kinetic energy (800eV) and annealing at low temperature (550 K), we successfully prepared a metastable (1 x 1) bulk-like phase from a clean and stable (1 x 2) reconstructed phase of Pt(110). The advantages of this new method, compared to the conventional method, are the easier preparation and the absence of residual hydrogen on the surface. A video-LEED was employed to study the behavior of the phase transition from (1 x 1) to (1 x 2); this phase transition is irreversible. The chemisorption of oxygen on the Pt(110) - (1 x 2) surface was studied by LEED, AES and TDS techniques. The experimental result showed that oxygen is adsorbed in the atomic state with a desorption energy of 101 kJ mol^(-1) at T = 560 K.