Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Pretreatment Effect on CO Oxidation over Highly Ordered Mesoporous Silver Catalyst

  • Shon, Jeong-Kuk (Department of Chemistry, BK21 School of Chemical Materials Science, Department of Energy Science and SKKU Advanced Institute of Nanotechnology, Sungkyunkwan University) ;
  • Park, Jung-Nam (Department of Chemistry, BK21 School of Chemical Materials Science, Department of Energy Science and SKKU Advanced Institute of Nanotechnology, Sungkyunkwan University) ;
  • Hwang, Seong-Hee (Department of Chemistry, BK21 School of Chemical Materials Science, Department of Energy Science and SKKU Advanced Institute of Nanotechnology, Sungkyunkwan University) ;
  • Jin, Mingshi (Department of Chemistry, BK21 School of Chemical Materials Science, Department of Energy Science and SKKU Advanced Institute of Nanotechnology, Sungkyunkwan University) ;
  • Moon, Ki-Young (Department of Chemistry, BK21 School of Chemical Materials Science, Department of Energy Science and SKKU Advanced Institute of Nanotechnology, Sungkyunkwan University) ;
  • Boo, Jin-Hyo (Department of Chemistry, BK21 School of Chemical Materials Science, Department of Energy Science and SKKU Advanced Institute of Nanotechnology, Sungkyunkwan University) ;
  • Han, Tae-Hee (Department of Semiconductor System, School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Kim, Ji-Man (Department of Chemistry, BK21 School of Chemical Materials Science, Department of Energy Science and SKKU Advanced Institute of Nanotechnology, Sungkyunkwan University)
  • Published : 2010.02.20
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Abstract

Highly ordered mesoporous silver material was successfully synthesized from a mesoporous silica template (KIT-6) with 3-D channel structure using the nano-replication method. The effects of $H_2$ or $O_2$ pretreatments on the catalytic performance of the mesoporous silver were investigated using a temperature programmed CO oxidation technique in a fixed bed reactor. The mesoporous silver material that was pretreated with $H_2$ exhibited an excellent catalytic activity compared to the as-prepared and $O_2$-pretreated catalysts. Moreover, this present mesoporous silver material showed good catalytic stability. For the CO oxidation, the apparent activation energy of the $H_2$-pretreated mesoporous silver catalyst was $61{\pm}0.5\;kJ\;mol^{-1}$, which was also much lower than the as-prepared ($132{\pm}1.5\;kJ\;mol^{-1}$) and $O_2$-pretreated ($124{\pm}1.4\;kJ\;mol^{-1}$) catalysts.

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