Synthesis and characterization of Mn₃O₄ and Mn₂O₃ nanocrystals on SBA-15: Novel combustion catalysts at low reaction temperatures

TY - JOUR

T1 - Synthesis and characterization of Mn3O4 and Mn2O3 nanocrystals on SBA-15

T2 - Novel combustion catalysts at low reaction temperatures

AU - Han, Yi Fan

AU - Chen, Fengxi

AU - Zhong, Zi Yi

AU - Ramesh, Kanaparthi

AU - Widjaja, Effendi

AU - Chen, Lu Wei

PY - 2006/10

Y1 - 2006/10

N2 - A simple method established in the present study has proven to be effective on the synthesis of Mn3O4 and Mn2O3 nanocrystals by using mesoporous silicas (SBA-15) as nanoreactor. These catalysts were characterized by XRD, TEM, N2-physisorption and laser Raman spectroscopic techniques. The structures obtained by thermolysis of Mn(II and III) acetylacetonates on SBA-15 were confirmed by XRD and Raman analysis. TEM characterization in combination with N2 physisorption studies reveal that nanoparticles partially occupying the pores of SBA-15. The nanocrystals of Mn3O4 and Mn2O3 on SBA-15 exhibited tremendous catalytic activities during the steady-state CO oxidation at low reaction temperatures (below 523 K). The catalytic activity of these catalysts was found to be higher compared with traditional MnOx impregnated on SBA-15 catalysts. For the sake of comparison, the commercial Mn2O3 and Mn3O4 were also tested for the CO oxidation.

AB - A simple method established in the present study has proven to be effective on the synthesis of Mn3O4 and Mn2O3 nanocrystals by using mesoporous silicas (SBA-15) as nanoreactor. These catalysts were characterized by XRD, TEM, N2-physisorption and laser Raman spectroscopic techniques. The structures obtained by thermolysis of Mn(II and III) acetylacetonates on SBA-15 were confirmed by XRD and Raman analysis. TEM characterization in combination with N2 physisorption studies reveal that nanoparticles partially occupying the pores of SBA-15. The nanocrystals of Mn3O4 and Mn2O3 on SBA-15 exhibited tremendous catalytic activities during the steady-state CO oxidation at low reaction temperatures (below 523 K). The catalytic activity of these catalysts was found to be higher compared with traditional MnOx impregnated on SBA-15 catalysts. For the sake of comparison, the commercial Mn2O3 and Mn3O4 were also tested for the CO oxidation.

KW - CO oxidation and TEM

KW - MnO

KW - MnO

KW - Nanocrystalline manganese oxides

KW - SBA-15

UR - http://www.scopus.com/inward/record.url?scp=33748521514&partnerID=8YFLogxK

U2 - 10.1016/j.catcom.2006.08.006

DO - 10.1016/j.catcom.2006.08.006

M3 - 文章

AN - SCOPUS:33748521514

SN - 1566-7367

VL - 7

SP - 739

EP - 744

JO - Catalysis Communications

JF - Catalysis Communications

IS - 10

ER -