Electrode processes, by definition, occur at an interface. It follows that electrochemical measurements on electrodes are affected by surface conditions and tell something about the state of the surface. Electrochemical measurements, however, require an electrolyte on one side of the interface, and high potential gradients across this region may occur (≈ 106 V/cm). the surface can be materially different from that in equilibrium at the solid-gas interface as a result of rearrangement of surface atoms and adsorption from solution of ions or molecules in the electrolyte. There have been few attempts, for this reason, to use electrochemical methods to obtain knowledge about the solid-gas interface. There are many practical situations where a knowledge of the solid-electrolyte interface is desired, however, and it is in these situations where the techniques discussed in this chapter may be of value.
KeywordsZinc Porosity Nickel Mercury Platinum
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