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    • RAHUL MORE

      Articles written in Bulletin of Materials Science

    • Volume 45 All articles Published: 23 June 2022 Article ID 0111

      Highly facile Co$^{2+}$ and Mn$^{3+}$ species supported on hydroxyapatite catalyst for carbon monoxide oxidation at a lower temperature

      RAHUL MORE PAVAN MORE

      More Details Abstract Fulltext PDF

      The series of bimetallic Co and Mn supported on hydroxyapatite (HAp) catalysts were prepared by successive deposition method and examined for CO oxidation. The catalysts are characterized in detail and correlated to oxidation activity. The X-ray diffraction, X-ray photoelectron spectroscopy and temperature-programmed reduction characterization showed the presence of more facile Co$^{2+}$, Mn$^{3+}$ and adsorbed oxygen. The attenuated total reflection-Fourier transform infrared demonstrated the adsorption of water on active sites of catalyst was responsible for the shifting of activity towards higher temperatures. The Co$_{0.4}$/Mn$_{0.1}$ /HAp catalyst showed lower activation energy for CO oxidation compared to the monometallic catalysts. Interaction between Mn, Co and HAp could be responsible for the existence of Co$^{2+}$, Mn$^{3+}$ and adsorbed oxygen, which are active species for CO oxidation.

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