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OMS-2 Catalysts for Formaldehyde Oxidation: Effects of Ce and Pt on Structure and Performance of the Catalysts

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Abstract

OMS-2 (2 × 2 type octahedral molecular sieve) and cerium doped OMS-2 were synthesized by refluxing method. The platinum doped on both samples was prepared by impregnation method for catalytic oxidation of formaldehyde. These catalysts were characterized by BET, XRD, SEM, H2-TPR and Laser Raman. Results show that OMS-2 formed needle-shape nanocrystal structure. The addition of Ce before the formation of the OMS-2 structure obstructs the process due to mismatch of the cation size. Rather than into the framework of the structure, the addition of Pt after the formation of the OMS-2 structure was loaded on the surface of catalysts, which strongly influenced the bonding of the Mn–O lattice of OMS-2. The properties of the catalyst structure determine the temperature of complete oxidation of HCHO while Pt promotes this reaction at a lower temperature range due to active surface oxygen species and lattice defects.

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Authors and Affiliations

  1. Department of Environmental Science and Engineering, Tsinghua University, Beijing, 100084, China

    Renhu Wang & Junhua Li

  2. Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, 48109-2136, USA

    Junhua Li

Authors
  1. Renhu Wang
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  2. Junhua Li
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Correspondence to Junhua Li.

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Wang, R., Li, J. OMS-2 Catalysts for Formaldehyde Oxidation: Effects of Ce and Pt on Structure and Performance of the Catalysts. Catal Lett 131, 500–505 (2009). https://doi.org/10.1007/s10562-009-9939-5

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  • DOI: https://doi.org/10.1007/s10562-009-9939-5

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