Effect of cathodic hydrogen charging on catalytic activity of Cu-Hf amorphous alloys

M. Pisarek, M. Janik-Czachor, A. Gebert, A. Molnár, P. Kedzierzawski, B. Rác

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Hydrogen charging of Cu65Hf35 and Cu61Hf39 amorphous alloy (AA) ribbons at i=-1mA/cm2 in an alkaline solution (0.1M NaOH) was used to study the effect of hydrogenation on the processes of morphology and crystallization. A similar procedure was applied in an acid solution (0.1M H2SO 4) to introduce more hydrogen to bring about more pronounced morphological and structural changes. The samples were then catalytically tested for dehydrogenation of 2-propanol. Catalytic activity increased up to 88% at selectivities to acetone of about 95%. The structural, chemical, and morphological changes were followed by X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM), and X-ray electron probe microanalysis (WDS). The hydrogen content was determined by elemental analysis, or by gas extraction.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalApplied Catalysis A: General
Volume267
Issue number1-2
DOIs
Publication statusPublished - Jul 30 2004

Fingerprint

Amorphous alloys
Hydrogen
Catalyst activity
Wavelength dispersive spectroscopy
2-Propanol
Catalyst selectivity
Electron probe microanalysis
Propanol
Dehydrogenation
Acetone
Crystallization
Hydrogenation
Atomic force microscopy
Gases
X ray diffraction
X rays
Scanning electron microscopy
Acids
Chemical analysis

Keywords

  • 2-Propanol
  • Amorphous alloys
  • Catalyst
  • Cathodic hydrogen charging
  • Cu-based alloys
  • Dehydrogenation of z-propanol
  • Microscopic characterization

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Effect of cathodic hydrogen charging on catalytic activity of Cu-Hf amorphous alloys. / Pisarek, M.; Janik-Czachor, M.; Gebert, A.; Molnár, A.; Kedzierzawski, P.; Rác, B.

In: Applied Catalysis A: General, Vol. 267, No. 1-2, 30.07.2004, p. 1-8.

Research output: Contribution to journalArticle

Pisarek, M. ; Janik-Czachor, M. ; Gebert, A. ; Molnár, A. ; Kedzierzawski, P. ; Rác, B. / Effect of cathodic hydrogen charging on catalytic activity of Cu-Hf amorphous alloys. In: Applied Catalysis A: General. 2004 ; Vol. 267, No. 1-2. pp. 1-8.
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