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Protonic Conduction Properties of Nanostructured Gd-doped CeO2 at Low Temperatures
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 Title & Authors
Protonic Conduction Properties of Nanostructured Gd-doped CeO2 at Low Temperatures
Park, Hee Jung; Shin, Jae Soo; Choa, Yong Ho; Song, Han Bok; Lee, Ki Moon; Lee, Kyu Hyoung;
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The electrical properties of nanostructured Gd-doped (n-GDC) as a function of temperature and water partial-pressure were investigated using ac and dc measurements. For n-GDC, protonic conductivity prevails under wet condition and at low temperatures (< ), while oxygen ionic conductivity occurs at high temperatures (> ) under both dry and wet conditions. The grain boundaries in n-GDC were highly selective, being conductive for protonic transport but resistive for oxygen ionic transport. The protonic conductivity reaches about at room temperature (RT).
Nanostructure;Protonic conductor;Ceria;
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