Abstract

The application of ther results of titration in the oxygen—hydrogen system to the determination of metal surface seems to be influenced by water, the product of the titration process. The dependence of the titration results on the number of successive titration cycles is discussed in terms of a proposed blocking mechanism, according to which water from the support gradually blocks part of the metal surface. The results of hydrogen and oxygen chemisorption and hydrogne—oxygen titrations are compared with respect to rhodium surface area determination.

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