An oxygen pool from YBaCo4O7-based oxides for soot combustion

Guangkai Tian, Hui Chen, Chenxi Lu, Ying Xin, Qian Li, James A. Anderson, Zhaoliang Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

Soot, often referred to as black carbon emitted from diesel engines, is not only a particulate matter pollutant but also a light-absorbing agent that may affect global climate, but can be effectively controlled using a catalytic diesel particulate filter (DPF). A new YBaCo4O7+delta-type oxygen storage material is reported as an effective catalyst for soot combustion. Isotopic isothermal reactions demonstrate the activation of gaseous oxygen and subsequent oxygen storage and reaction/desorption during an oxidation process. High activity and structural stability are achieved by the substitution of Co with Al and Ga to form YBa(Co0.85Al0.075Ga0.075)(4)O7+delta. The specific rates at 300 degrees C of YBaCo4O7+delta and YBa(Co0.85Al0.075Ga0.075)(4)O7+delta, normalized by surface areas, are an order of magnitude higher than those of CeO2-based oxides. This kind of oxygen-storage material acts as an oxygen pool, which ensures that the accumulated soot on a DPF can be promptly combusted.

Original languageEnglish
Pages (from-to)4511-4515
Number of pages5
JournalCatalysis Science & Technology
Volume6
Issue number12
Early online date5 Feb 2016
DOIs
Publication statusPublished - 2016

Keywords

  • DIESEL PARTICULATE FILTERS
  • LATTICE OXYGEN
  • MIXED OXIDES
  • DOPED CEO2
  • OXIDATION
  • CATALYSTS
  • YBACO4O7+DELTA
  • STABILITY
  • STORAGE
  • SUBSTITUTION

Cite this

Tian, G., Chen, H., Lu, C., Xin, Y., Li, Q., Anderson, J. A., & Zhang, Z. (2016). An oxygen pool from YBaCo4O7-based oxides for soot combustion. Catalysis Science & Technology, 6(12), 4511-4515. https://doi.org/10.1039/c5cy02181b