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

Kenji Taira and Reiko Murao
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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

Energies, 2021, vol. 14, issue 23, 1-17

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 .

Keywords: CeO 2; MgO; dry reforming; heterogeneous catalysis; in situ XRD (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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