Morphological and electrochemical properties of crystalline praseodymium oxide nanorods

Abstract

Highly crystalline Pr 6O 11 nanorods were prepared by a simple precipitation method of triethylamine complex at 500°C. Synthesized Pr 6O 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 6O 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 6O 11 nanorod electrodes are attributed to the reduction of grain boundaries and high space charge width. © 2010 The Author(s).