Scandium and copper co-doping effect on stability and activity to the NO direct decomposition of Ba3Y4O9

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Abstract

Direct decomposition of NO on Ba3Y4O9 doped with Cu and Sc was studied and it was found that co-doping of Sc and Cu into Ba3Y4O9 was effective for increasing both lattice stability and NO decomposition activity. In particular, Ba3Y3Sc0.6Cu0.4O9 (10 % Cu and 15 % Sc doping) catalyst showed N2 and O2 yield of 90 % and 99 %, respectively, in NO decomposition reaction at 700 ℃. Comparing with the pristine and single-metal doped system, the optimized catalyst showed superior long-term stability and increased activity under O2, and water vapor co-existence conditions because of the increased stability of crystal structure, improved lattice oxygen mobility and weakened oxygen adsorption on the surface. TPD and in-situ FT-IR results suggested that the co-doping effect was assigned to the easier removal of surface NO2 or NO3 species which blocks the active site to NO decomposition.

Original languageEnglish
Article number117743
JournalApplied Catalysis A: General
Volume602
DOIs
Publication statusPublished - Jul 25 2020

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Process Chemistry and Technology

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