FEM AND FIM STUDY OF REACTION ZONES ON PLATINUM

The initial shape of the reaction zones for the interaction of hydroge n and oxygen on the surfaces of the single crystals of platinum in FEM and FIM devices is discussed in connection with the effect of tempera ture and surface anisotropy. Interaction of the (H-2 + O-2) mixture ha s been studied at room temperature and the results were confronted wit h the interaction of hydrogen and preadsorbed oxygen at low temperatur e and with the anisotropy of the low-temperature field-corrosion of pl atinum.