• Role of Ba(O$_2$)$_{1-x}$O$_x$ species in improvement of selective oxidation activity of CoO$_x$/CeO$_{2-y}$

    • Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/043/0164

    • Keywords

       

      Hydroxyl species; optimum surface basicity; oxygen vacancies.

    • Abstract

       

      A series of Ba-doped CoO$_x$/CeO$_{2-y}$ catalysts was prepared by co-precipitation followed by the deposition–precipitation method. The catalysts were investigated for selective oxidation (selox) of benzyl alcohol (B-ol) using tertiarybutyl hydroperoxide (TBHP) without solvent and activity was compared with Co$_{0.5}$/Ce$_{0.5}$. The Ba loading has been optimized with time and temperature for selox reaction. The catalyst was characterized by various surface and bulk characterization techniques. The characterization study indicates that the synergistic interaction between Ba and CoCe could form more oxygen vacancies and peroxide species responsible for the activation of B-ol and TBHP. The formation of Ba(O$_2$)$_{1-x}$O$_x$ oxide (peroxide) was observed and could be responsible for the activation of B-ol. The optimum Ba doping enhances selectivity and yields benzaldehyde. However, the increase in Ba concentration on CoO$_x$/CeO$_{2-y}$ could lead to the over-oxidation of B-ol to by-products.

    • Author Affiliations

       

      R K MORE1 N R LAVANDE1 P M MORE1

      1. Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai 400019, India
    • Dates

       
  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.