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      https://www.ias.ac.in/article/fulltext/jcsc/133/0068

    • Keywords

       

      Cerium oxide; Europium ion doped-ceria; Catalyst support; Catalyst characterization; Soot oxidation; Benzylamine oxidation.

    • Abstract

       

      The present work describes the role of oxide supports such as alumina (Al2O3), silica (SiO2), andtitania (TiO2) on the structural and catalytic properties of europiumion-doped ceriumoxide. In particular, themainmotive of this study was to further improve the catalytic efficiency of Ce0.8Eu0.2O2-d solid solutions for oxidationreactions.Diesel soot oxidation and oxidative coupling of benzylamine were examined asmodel reactions to assessthe catalytic properties of the prepared materials. These were prepared by deposition coprecipitation method andcharacterized by various techniques namely, X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy,transmission electron microscopy, and BET/BJH surface area and pore-size distribution methods. Thecharacterization studies reveal that Ce0.8Eu0.2O2-d is well-dispersed without the formation of CeO2 or Eu2O3 crystalline compounds over the surface of various supports. The TEMstudies confirm the nano-crystalline natureof the Ce0.8Eu0.2O2-d and Raman studies indicate the formation of oxygen vacancies which are significant foroxidation reactions.As expected, the supported Ce0.8Eu0.2O2-d mixed oxides exhibited better catalytic activity thanpure ceria and unsupported oxides towards the soot and benzylamine oxidation reactions.

    • Graphical Abstract

       

      Supported Ce0.8Eu0.2O2-d(CE) catalysts are exhibiting better performance than unsupported CE and pure ceria for soot and benzylamine oxidation owing to metal oxide-support and metal oxide-metal oxide interactions.

    • Author Affiliations

       

      VINODKUMAR T1 2 PRASHANTH KUMAR J K1 BENJARAM M REDDY1

      1. Catalysis and Fine Chemicals Department, CSIR-Indian Institute of Chemical Technology, Uppal Road, Hyderabad 500 007, India
      2. School of Chemistry, University of Hyderabad, Gachibowli, Hyderabad 500 046, India
    • Dates

       
  • Journal of Chemical Sciences | News

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