Platinum oxygen coverage

Biegler T, Rand DAJ, Woods R. 1971. Limiting oxygen coverage on platinized platinum Relevance to determination of teal platinum area by hydrogen adsorption. J Electroanal Chem 29 269-277. 

In summary, a variety of LEED patterns have been observed for oxygen adsorption on the platinum metals. However, their interpretation is complicated by the uncertainty in the oxygen coverage. A second complication is the uncertainty introduced by oxygen-induced surface reconstruction. The stability of 22 high index Miller planes upon exposure to oxygen has recently been investigated by Blakely and Somorjai (160). 

Fig. 42. Variation of the oxygen coverage with time for CO impinging on an oxygen-covered platinum surface at various temperatures (132).

The above results indicate that a relatively high oxygen coverage on platinum promotes NO(a) formation. At low temperatures, NO(a) leads to N2O via ... 

Fig. 35. Corrected rate of H2 oxidation on platinum in 1 M HCIO4 and oxygen coverage as functions of potential during the anodic sweep under voltammetric conditions...

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