Hydrogen is one of the most efficient embrittling atomic species introducing both structural and chemical changes in solid materials and eventually, causing their degradation. This highly detrimental effect - when controlled - may, however, be used in benefit of e.g. enhancing catalytic activity of materials by increasing their specific surface area and modifying surface chemistry. This method was used to activate Cu-Hf (Cu65Hf35, Cu61Hf39) amorphous alloys for catalytic purposes.
Hydrogen charging at i=1 mA/cm² in alkaline solution (0.1M NaOH) was used to study the effect of hydrogenation on morphology and crystallization processes. A similar procedure was applied in acid solution (0.1M H2SO4) to introduce more hydrogen and more pronounced morphological and structural changes. The samples were then catalytically tested for dehydrogenation of 2-propanol. The efficiency increased up to 50% at selectivities close to 100%. The structural, chemical and morphological changes were followed with: XRD, AFM, SEM, X-ray electron probe microanalysis (EDS). H/Me ratio was determined by elemental analysis.

This work was supported by the State Committee for Scientific Research under grant 7T08C02524

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