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Effect of Metal Oxide Promoters on Low Temperature CO Oxidation over Water-Pretreated Pt/Alumina Catalysts

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Abstract

Addition of oxides of transition metals such as Mn, Fe, Co, Ni, Cu, and Ce to Pt/Al2O3 catalysts followed by water-pretreatment enhanced its CO oxidation activity. Iron oxide was the most effective promoter between −40 and 150 °C among those examined. Below 120 °C, CO conversion was maximized at the Fe to Pt molar ratio of 1, whereas above 120 °C conversion increased monotonically with Fe content. Pt L III extended X-ray absorption fine structure analyses suggested that the formation of Pt–Fe alloy enhanced CO oxidation activity at high temperatures but reduced it at low temperatures.

Graphical Abstract

CO oxidation over 2.5wt%Pt/xwt%FeOx/Al2O3 catalysts

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Acknowledgments

The synchrotron radiation experiments were performed at BL01B1 and BL14B2 of SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal Nos. 2012B1922 and 2013B1835). This work was partly supported by JSPS KAKENHI Grant Number 26420790.

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Authors and Affiliations

  1. Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology (AIST), Nagoya, 463-8560, Japan

    Atsuko Tomita & Yutaka Tai

  2. Catalysis Research Center, Hokkaido University, Sapporo, 001-0021, Japan

    Ken-ichi Shimizu

Authors
  1. Atsuko Tomita
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  2. Ken-ichi Shimizu
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  3. Yutaka Tai
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Correspondence to Atsuko Tomita.

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Tomita, A., Shimizu, Ki. & Tai, Y. Effect of Metal Oxide Promoters on Low Temperature CO Oxidation over Water-Pretreated Pt/Alumina Catalysts. Catal Lett 144, 1689–1695 (2014). https://doi.org/10.1007/s10562-014-1305-6

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  • DOI: https://doi.org/10.1007/s10562-014-1305-6

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