| Abstract
| - Surface modification of CeO2−ZrO2 solid solutions took place using formation and transportof volatile vapor complexes such as AlCl3−CeCl3 and AlCl3−ZrCl4, which was denoted as“chemical filing.” XPS analysis showed surface Ce enrichment, and transmission electronmicroscopy and Raman spectra revealed that a defective phase was formed on the surfaceof the samples by the chemical filing. The reduction temperature of the samples after thechemical filing was about 50 K lower than that of the fresh sample and further decreasedby a reduction/reoxidation cycle. The redox property of the chemically filed sample wasmaintained even after the redox cycles at high temperatures, indicating its excellentdurability compared to the solid solution prepared by a conventional procedure.
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