Abstract

It is shown that a convenient method for obtaining very fast rates of H 2 absorption by Pd is by its oxidation or by the internal oxidation of Pd-M alloys where M=a solute more readily oxidizable than Pd such as Al. While the oxidation of Pd enhances the rates it does not affect its H 2 solubility because its oxidized layers are rapidly reduced upon exposure to H 2 even at low temperatures. The internal oxidation of Pd–M alloys, gives a matrix of pure Pd containing internal oxide precipitates, e.g., a Pd/alumina composite. The solubility of H 2 in the Pd matrix should be equivalent to that in pure Pd.

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