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High Dispersion of CeO 2 on CeO 2 /MgO Prepared under Dry Conditions and Its Improved Redox Properties

Author

Listed:
  • Kenji Taira

    (Advanced Technology Research Laboratories, Nippon Steel Corporation, 20-1 Shintomi, Futtsu 293-8511, Chiba, Japan)

  • Reiko Murao

    (Advanced Technology Research Laboratories, Nippon Steel Corporation, 20-1 Shintomi, Futtsu 293-8511, Chiba, Japan)

Abstract

Suppressing the usage of rare-earth elements is crucial for making the catalysts sustainable. Preparing CeO 2 nanoparticles is a common technique to reduce CeO 2 consumption, but such nanoparticles are prone to sinter or react with the supports when subjected to heat treatments. This study demonstrated that stable CeO 2 nanoparticles were deposited on MgO by the simple impregnation method. When CeO 2 /MgO was prepared under the dry atmosphere, the CeO 2 nanoparticles remained ~3 nm in diameter even after being heated at 800 °C, which is much smaller than ~5 nm of CeO 2 /MgO prepared under ambient air. Temperature-programmed reduction, temperature-programmed oxidation, X-ray photoelectron spectroscopy, and in situ X-ray diffraction studies showed that CeO 2 /MgO exhibited higher oxygen mobility when prepared under the dry atmosphere. Dry reforming reaction demonstrated that CeO 2 /MgO prepared under the dry atmosphere exhibited higher activity than that prepared under ambient air and pure CeO 2 .

Suggested Citation

  • Kenji Taira & Reiko Murao, 2021. "High Dispersion of CeO 2 on CeO 2 /MgO Prepared under Dry Conditions and Its Improved Redox Properties," Energies, MDPI, vol. 14(23), pages 1-17, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:23:p:7922-:d:688126
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