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Publication Detail
Operando Spectroscopic Studies of Cu–SSZ-13 for NH3–SCR deNOx Investigates the Role of NH3 in Observed Cu(II) Reduction at High NO Conversions
  • Publication Type:
    Journal article
  • Publication Sub Type:
  • Authors:
    Greenaway AG, Lezcano-Gonzalez I, Agote-Aran M, Gibson EK, Odarchenko Y, Beale AM
  • Publication date:
  • Pagination:
    1, 8
  • Journal:
    Topics in Catalysis
  • Status:
  • Print ISSN:
© 2018 The Author(s) The small pore zeolite chabazite (SSZ-13) in the copper exchanged form is a very efficient material for the selective catalytic reduction by ammonia (NH 3 ) of nitrogen oxides (NOx) from the exhaust of lean burn engines, typically diesel powered vehicles. The full mechanism occurring during the NH 3 –SCR process is currently debated with outstanding questions including the nature and role of the catalytically active sites. Time-resolved operando spectroscopic techniques have been used to provide new level of insights in to the mechanism of NH 3 –SCR, to show that the origin of stable Cu(I) species under SCR conditions is potentially caused by an interaction between NH 3 and the Cu cations located in eight ring sites of the bulk of the zeolite and is independent of the NH 3 –SCR of NOx occurring at Cu six ring sites within the zeolite.
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