A first-principles study was made of the adsorption and diffusion of OH on Pt and PtMo(111) surfaces. It confirmed that the dissociation of water was much easier on PtMo than on pure Pt. It was also found that OH bonded most strongly at Mo on top of sites with an adsorption energy of -3.32eV. This was about 1eV stronger than the binding to a pure Pt(111) surface. The OH was much more localized on the PtMo alloy surface than on pure Pt.
Adsorption and Diffusion of OH on Mo Modified Pt(111) Surface - First-Principles Theory. Z.Ji, A.F.Jalbout, J.Q.Li: Solid State Communications, 2007, 142[3], 148-53
Table 13
Diffusivity of Ni and Pd in Pd40Ni40P20 Melt
Temperature (K) | Diffusant | D (m2/s) |
1005 | Ni | 5.3 x 10-10 |
1005 | Pd | 5.1 x 10-10 |
1024 | Ni | 4.9 x 10-10 |
1054 | Ni | 1.0 x 10-9 |
1054 | Pd | 1.1 x 10-9 |
1073 | Ni | 7.8 x 10-10 |