Morphological and Electrochemical Properties of Crystalline Praseodymium Oxide Nanorods

Highly crystalline Pr(6)O(11) nanorods were prepared by a simple precipitation method of triethylamine complex at 500°C. Synthesized Pr(6)O(11) nanorods were uniformly grown with the diameter of 12–15 nm and the length of 100–150 nm without any impurities of unstable PrO(2) phase. The Pr(6)O(11) nanorod electrodes attained a high electrical conductivity of 0.954 Scm(−1) with low activation energy of 0.594 eV at 850°C. The electrochemical impedance study showed that the resistance of electrode was significantly decreased at high temperature, which resulted from its high conductivity and low activation energy. The reduced impedance and high electrical conductivity of Pr(6)O(11) nanorod electrodes are attributed to the reduction of grain boundaries and high space charge width.