Collect. Czech. Chem. Commun. 1997, 62, 213-217

FEM and FIM Study of Reaction Zones on Platinum

Zlatko Knor, Jan Plšek and Luboš Dvořák

J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, 182 23 Prague 8, Czech Republic


The initial shape of the reaction zones for the interaction of hydrogen and oxygen on the surfaces of the single crystals of platinum in FEM and FIM devices is discussed in connection with the effect of temperature and surface anisotropy. Interaction of the (H2 + O2) mixture has been studied at room temperature and the results were confronted with the interaction of hydrogen and preadsorbed oxygen at low temperature and with the anisotropy of the low-temperature field-corrosion of platinum.

Keywords: Surface reaction zone; Platinum surface; Field corrosion.