Palladium body centered cubic structure

The adsorption of CO on nickel has received extensive study since large area nickel films are comparatively simple to prepare. The nickel system therefore offered the possibility of producing a clean surface on a metal crystallizing with a face centered cubie structure. The results obtained on this surface could then be compared with those measured on tungsten, which crystallizes with a body centered,cubic structure. Much of the earlier work carried out for CO adsorption on the elements nickel, palladium, and platinum was reviewed by Gundry and Tompkins in 1960 135). 

In the patent by Hill, an aUoy of titanium containing 13 wt%vanadium, 11 wt% chromium and 3 wt% aluminum was developed as a hydrogen transport membrane material [12]. In this alloy, the crystal structure of titanium, which is normally hexagonal below 1153 K (880 °C), is stabilized in its high-temperature body centered cubic allotropic form. The body centered cubic crystal lattice is preferred for hydrogen transport. This titanium alloy was found to have hydrogen permeability superior to that of pure palladium in the range 300-450 °C (573-723 K)... 

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