Alternating nitrous oxide/reductant cycles and the determination of copper area in supported copper catalysts

K. J. Soerensen, N. W. Cant*

*Corresponding author for this work

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Reduction, surface oxidation and re-reduction of a copper-on-silica catalyst has been investigated using hydrogen, carbon monoxide and nitrous oxide in a flow system with mass spectrometric determination. Hydrogen is more effective than carbon monoxide for the initial reduction of the catalyst as prepared in oxide form and the copper content can be accurately determined from the total gas consumption in both cases. However, carbon monoxide can quantitatively remove surface oxygen, deposited from nitrous oxide, at a temperature of 333 K, whereas the same process in hydrogen peaks at 383 K. A method for determining the quantity of surface copper by sequential N2O/CO cycles under isothermal conditions has been established.

Original languageEnglish
Pages (from-to)117-125
Number of pages9
JournalCatalysis Letters
Volume33
Issue number1-2
DOIs
Publication statusPublished - Mar 1995

Keywords

  • carbon monoxide reduction
  • copper on silica
  • nitrous oxide oxidation

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