The effect of gold on modern bimetallic Au-Cu/MWCNT catalysts for the oxy-steam reforming of methanol

Pawel Mierczynski, Krasimir Vasilev, Agnieszka Mierczynska, Waldemar Maniukiewicz, Radoslaw Ciesielski, Jacek Rogowski, Iwona M. Szynkowska, A. Yu Trifonov, Sergey V. Dubkov, Dmitry G. Gromov, Tomasz P. Maniecki

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36 Citations (Scopus)
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Abstract

Copper and gold doped copper catalysts supported on multi-walled carbon nanotubes were prepared by wet impregnation and deposition-precipitation methods, respectively. The catalysts were tested in the oxy-steam reforming of methanol (OSRM) and characterized by XRD, SEM-EDS, TOF-SIMS, thermo-gravimetric analysis and temperature-programmed desorption of ammonia. The reactivity results showed the promotion effect of gold on the activity and selectivity of the copper catalysts in the OSRM. The formed Cu-Au alloy as an active phase was responsible for the activity and selectivity improvement of the bimetallic catalysts in the oxy-steam reforming of methanol. The formation of an Au-Cu alloy was confirmed by the XRD, TOF-SIMS and SEM-EDS techniques. The reducibility and acidity of the tested catalysts are important factors, which influence the activity of the copper and gold-copper catalysts.

Original languageEnglish
Pages (from-to)4168-4183
Number of pages16
JournalCatalysis Science and Technology
Volume6
Issue number12
DOIs
Publication statusPublished - 21 Jun 2016
Externally publishedYes

Keywords

  • Bimetallic catalysts
  • Au–Cu/MWCNT
  • doped catalysts
  • Copper catalyst
  • gold catalyst
  • multi-walled carbon nanotubes
  • OSRM
  • Au-Cu
  • ToF-SIMS
  • SEM-EDS

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