The oxidation mechanism of CdTe (110) surface

The Oxidation Mechanism of CdTe (110) Surface

Using a first-principles pseudopotential technique within a generalized gradient approximation of the density functional theory, we have investigated the mechanism of adsorption of molecular oxygen on the CdTe(110) surface. The determination of the more favorables structures and their formation through the activation barrier analysis indicates that the formation can occur in the regimes of low ...

THE OXIDATION OF HzCO ON A COPPER ( 110 ) SURFACE

The oxidation of HzCr60 by adsorbed ’ *O was studied on an Cu(ll0) sample by temperature programmed reaction spectroscopy. Formaldehyde exchanged its oxygen with surface ’ *O upon adsorption to yield H~C’*O(,) and 160(,). Formaldehyde was also oxidized by surface ’ 6O and “0 atoms to HaCOO which subsequently released one of the hydrogen atoms to form HCOO. The evolution of Ha from the Cu(ll0) s...

Surface stoichiometry and the initial oxidation of NiAl(110).

Selective oxidation of the surface of an ordered alloy requires redistribution of the atomic species in the vicinity of the surface. This process can be understood in terms of the formation and movements of point defects in the compound. On the basis of ab initio density-functional calculation we found both the creation of exchange defects near the NiAl surface and segregation of Ni vacancies t...

Role of ethylene on surface oxidation of TiO2(110)

Oxidation of Pt(110).

Using scanning tunneling microscopy and temperature programmed desorption we investigate the Pt(110) surface under strongly oxidizing conditions involving either high-pressure O2 or atomic oxygen exposure. At low temperatures, only disordered Pt oxide structures are observed. After annealing ordered surface oxide islands are observed to coexist with a highly stable reconstructed (12x2)-O chemis...