Occluded hydrogen has proven effective to remove the CO that anchor on the metal surface. This has been done on Palladium metal. One of the problems is that the treatment with hydrogen distror and ultimately destroy the metallic matrix. Thus, the non-poisoning effect is loss. However, palladium alloys does not suffer such distortion. No wonder palladium alloys electrocatalyst has shown this non-poisoning effect [JES, 149 (2002) A1400]. What do you think?

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