Highly efficient NO direct decomposition over BaMnO3-CeO2 composite catalysts

Wenxue Ji, Pingping Xie, Yongdan Li, Cuijuan Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Developing high-performance catalyst is of paramount importance for NO direct decomposition. Here, composite catalysts BaMnO3-CeO2 were designed and prepared by the one-pot method, which show high catalytic activity, oxygen resistance and durability. The NO conversion to N2 of 85.9% at 800 °C is achieved over 5%BaMnO3-CeO2. It exhibits 66.5% activity in the presence of 10 vol% O2 and runs stable for more than 200 h in 5 vol% O2 at 800 °C. The high performance is originated from the strong interaction between BaMnO3 and CeO2 components, where CeO2 can effectively inhibit the sintering of BaMnO3 particles, enhance the redox activity, mobility of lattice oxygen and NO sorption. The proposed catalytic mechanism based on diffuse reflectance infrared Fourier transform spectroscopy and kinetic study reveals that the formation of N2O* intermediate species is the rate determining step. BaMnO3-CeO2 composite can be a promising catalyst candidate for NO direct decomposition.

Original languageEnglish
Article number118543
Number of pages9
JournalApplied Catalysis A: General
Volume634
Early online date23 Feb 2022
DOIs
Publication statusPublished - 25 Mar 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • BaMnO
  • CeO
  • NO direct decomposition
  • One-pot
  • Perovskite

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