Reduction of NO with CH 4 over platinum supported on cobalt phosphate catalyst

Masaru Kagawa, Hitoshi Kawamyra, Shuji Kimura, Hiroyasu Nishiguchi, Tatsumi Ishihara, Yusaku Takita

Research output: Contribution to journalArticle

Abstract

Selective reduction of NO with CH 4 on platinum supported on cobalt phosphate was investigated. It was found that Pt/Co 3(PO 4) 2 exhibits the high activity to NO reduction with CH 4. NO conversion increased with increasing amount of Pt loading and it attained to a maximum activity at 1 wt% Pt. Conversion of NO was always higher than that of NO 2 on Pt/Co 3(PO 4) 2 under the same condition. This result suggested that the reduction of NO was proceeded not through the formation of NO 2 or NO 3 - as intermediate species but 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 N 2 was exhibited when no oxygen was coexisted. Temperature programmed desorption (TPD) measurement suggested that loading Pt accelerates the dissociative adsorption of NO and weakened the adsorption of O 2. Therefore, it seems that NO decomposition on Pt/Co 3(PO 4) 2 was initiated by the dissociative adsorption of NO. Coexisting CH 4 removed the formed oxygen which strongly adsorbed on the catalyst and recovered the active site. This study reveals that Pt supporting on Co 3(PO 4) 2 is highly active for the reduction of NO with CH 4.

Original languageEnglish
Pages (from-to)74-75
Number of pages2
JournalKagaku Kogaku Ronbunshu
Volume27
Issue number1
Publication statusPublished - 2001
Externally publishedYes

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Cobalt
Platinum
Phosphates
Catalysts
Oxygen
Adsorption
Decomposition
Temperature programmed desorption
Partial pressure

All Science Journal Classification (ASJC) codes

  • Materials Science (miscellaneous)

Cite this

Kagawa, M., Kawamyra, H., Kimura, S., Nishiguchi, H., Ishihara, T., & Takita, Y. (2001). Reduction of NO with CH 4 over platinum supported on cobalt phosphate catalyst. Kagaku Kogaku Ronbunshu, 27(1), 74-75.

Reduction of NO with CH 4 over platinum supported on cobalt phosphate catalyst. / Kagawa, Masaru; Kawamyra, Hitoshi; Kimura, Shuji; Nishiguchi, Hiroyasu; Ishihara, Tatsumi; Takita, Yusaku.

In: Kagaku Kogaku Ronbunshu, Vol. 27, No. 1, 2001, p. 74-75.

Research output: Contribution to journalArticle

Kagawa, M, Kawamyra, H, Kimura, S, Nishiguchi, H, Ishihara, T & Takita, Y 2001, 'Reduction of NO with CH 4 over platinum supported on cobalt phosphate catalyst', Kagaku Kogaku Ronbunshu, vol. 27, no. 1, pp. 74-75.
Kagawa M, Kawamyra H, Kimura S, Nishiguchi H, Ishihara T, Takita Y. Reduction of NO with CH 4 over platinum supported on cobalt phosphate catalyst. Kagaku Kogaku Ronbunshu. 2001;27(1):74-75.
Kagawa, Masaru ; Kawamyra, Hitoshi ; Kimura, Shuji ; Nishiguchi, Hiroyasu ; Ishihara, Tatsumi ; Takita, Yusaku. / Reduction of NO with CH 4 over platinum supported on cobalt phosphate catalyst. In: Kagaku Kogaku Ronbunshu. 2001 ; Vol. 27, No. 1. pp. 74-75.
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AU - Takita, Yusaku

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N2 - Selective reduction of NO with CH 4 on platinum supported on cobalt phosphate was investigated. It was found that Pt/Co 3(PO 4) 2 exhibits the high activity to NO reduction with CH 4. NO conversion increased with increasing amount of Pt loading and it attained to a maximum activity at 1 wt% Pt. Conversion of NO was always higher than that of NO 2 on Pt/Co 3(PO 4) 2 under the same condition. This result suggested that the reduction of NO was proceeded not through the formation of NO 2 or NO 3 - as intermediate species but 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 N 2 was exhibited when no oxygen was coexisted. Temperature programmed desorption (TPD) measurement suggested that loading Pt accelerates the dissociative adsorption of NO and weakened the adsorption of O 2. Therefore, it seems that NO decomposition on Pt/Co 3(PO 4) 2 was initiated by the dissociative adsorption of NO. Coexisting CH 4 removed the formed oxygen which strongly adsorbed on the catalyst and recovered the active site. This study reveals that Pt supporting on Co 3(PO 4) 2 is highly active for the reduction of NO with CH 4.

AB - Selective reduction of NO with CH 4 on platinum supported on cobalt phosphate was investigated. It was found that Pt/Co 3(PO 4) 2 exhibits the high activity to NO reduction with CH 4. NO conversion increased with increasing amount of Pt loading and it attained to a maximum activity at 1 wt% Pt. Conversion of NO was always higher than that of NO 2 on Pt/Co 3(PO 4) 2 under the same condition. This result suggested that the reduction of NO was proceeded not through the formation of NO 2 or NO 3 - as intermediate species but 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 N 2 was exhibited when no oxygen was coexisted. Temperature programmed desorption (TPD) measurement suggested that loading Pt accelerates the dissociative adsorption of NO and weakened the adsorption of O 2. Therefore, it seems that NO decomposition on Pt/Co 3(PO 4) 2 was initiated by the dissociative adsorption of NO. Coexisting CH 4 removed the formed oxygen which strongly adsorbed on the catalyst and recovered the active site. This study reveals that Pt supporting on Co 3(PO 4) 2 is highly active for the reduction of NO with CH 4.

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