FTIR characterization of Ru/SiO2 catalyst for ammonia synthesis

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Sayan S., Kantcheva M., Suzer S., Uner D.

JOURNAL OF MOLECULAR STRUCTURE, vol.481, pp.241-245, 1999 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 481
  • Publication Date: 1999
  • Doi Number: 10.1016/s0022-2860(98)00812-6
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.241-245
  • Keywords: Ru/SiO2 catalyst, ammonia synthesis, FTIR of adsorbed CO, SUPPORTED RUTHENIUM, CO-ADSORPTION, IR
  • Middle East Technical University Affiliated: Yes


Carbon monoxide adsorption on a Ru/SiO(2)catalyst was followed by IR spectroscopy to investigate the active sites. Using this catalyst, ammonia synthesis was achieved at 350 degrees C in an N-2/H-2 gas mixture (N-2/H-2 approximate to 3 : 1) for different reaction times. In addition to NH3 other NH, (x = 1,2) species were also observed. CO adsorption after NH3 production was also performed to investigate the change in nature of the active sites. Based on the experimental evidence participation of Ru-0 sites in ammonia synthesis was confirmed and a partial oxidation of the reduced Ru sites during the synthesis was observed. (C) 1999 Elsevier Science B.V. All rights reserved.