Hydrogenation under high pressure enhancing catalytic activity of Cu-Zr amorphous alloys

A. Szummer, M. Janik-Czachor, A. Molnár, I. Marchuk, M. Varga, S. M. Filipek

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Abstract

High pressures of hydrogen up to 3.0 GPa and temperatures up to 373 K were used as a pretreatment to introduce structural changes in the bulk and on the surface of Cu-Zr amorphous alloys which then were examined by means of x-ray diffraction and microscopy. The hydrogenative pretreatment of high hydrogen fugacity followed by annealing at 623 K, aimed at causing desorption of hydrogen, and an eventual exposure of the samples to air at room temperature to oxidize Zr, resulted in a distinct increase of catalytic activity in the dehydrogenation of 2-propanol. A tentative mechanism to account for the enhancement of the catalytic activity induced by the above combined pretreatment is discussed.

Original languageEnglish
Pages (from-to)11405-11409
Number of pages5
JournalJournal of Physics Condensed Matter
Volume14
Issue number44 SPEC ISS.
DOIs
Publication statusPublished - Nov 11 2002

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Szummer, A., Janik-Czachor, M., Molnár, A., Marchuk, I., Varga, M., & Filipek, S. M. (2002). Hydrogenation under high pressure enhancing catalytic activity of Cu-Zr amorphous alloys. Journal of Physics Condensed Matter, 14(44 SPEC ISS.), 11405-11409. https://doi.org/10.1088/0953-8984/14/44/490