Reduction of NO with CH4 over platinum supported on cobalt phosphate catalyst

M. Kagawa, H. Kawamura, S. Kimura, H. Nishiguchi, Tatsumi Ishihara, Y. Takita

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A study on the selective reduction of NO with CH4 on platinum supported on cobalt phosphate showed that Pt/Co3(PO4)2 exhibited the highest activity to NO reduction with CH4. NO conversion increased with increasing amount of Pt loading and attained a maximum activity at 1 wt % Pt. NO conversion was always higher than that of NO2 on Pt/Co3(PO4)2 under the same condition. The reduction of NO was proceeded through the direct decomposition of NO as a primary reaction. NO conversion increased with decreasing oxygen partial pressure and the high conversion of NO into N2 was exhibited when no oxygen coexisted. TPD measurement suggested that loading Pt accelerated the dissociative adsorption of NO and weakened the O2. Thus, NO decomposition on Pt/Co3(PO4)2 seemed to be initiated by the dissociative adsorption of NO. Coexisting CH4 removed the formed oxygen that strongly adsorbed on the catalyst and recovered the active site. Pt supporting on Co3(PO4)2 was highly active for the reduction of NO with CH4.

Original languageEnglish
Pages (from-to)69-75
Number of pages7
Issue number3
Publication statusPublished - Mar 1 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)


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