Effect of Mn promoter on Au/CeO2 for CO oxidation in H 2 stream

Y. W. Chen, L. H. Chang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Gold catalysts supported on CeO2, MnO2 and MnO 2-CeO2 composite oxides were prepared by deposition-precipitation (DP) method and the effect of Mn promoter for preferential oxidation of CO in H2 stream have been investigated using a fixed bed continuous flow reactor. All the catalysts were characterized by XRD, nitrogen sorption, TEM and XPS techniques. XRD patterns demonstrate the phase purity of CeO2 and MnO2 phases, and TEM micrographs confirm the fine dispersion of Au on Au/MnO2-CeO2 catalysts. XPS analysis shows the formation of MnO2-CeO2 solid phase with manganese loading on ceria support accompanied by an increase in Ce4+ surface concentration. Au/Mn-modified-CeO2 catalyst demonstrated excellent performance on both CO conversion and selectivity to CO oxidation at fuel cell temperature (80°C).

Original languageEnglish
Title of host publicationCHISA 2006 - 17th International Congress of Chemical and Process Engineering
StatePublished - 2006
EventCHISA 2006 - 17th International Congress of Chemical and Process Engineering - Prague, Czech Republic
Duration: 27 Aug 200631 Aug 2006

Publication series

NameCHISA 2006 - 17th International Congress of Chemical and Process Engineering

Conference

ConferenceCHISA 2006 - 17th International Congress of Chemical and Process Engineering
Country/TerritoryCzech Republic
CityPrague
Period27/08/0631/08/06

Keywords

  • Ceria
  • CO oxidation
  • Fuel cell
  • MnO
  • PROX

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