Morphological and Electrochemical Properties of Crystalline Praseodymium Oxide Nanorods
School of Semiconductor and Chemical Engineering and Solar Energy Research Center, Chonbuk National University, Jeonju, 561-756, Republic of Korea
Nanoscale Research Letters 2010, 5:735-740 doi:10.1007/s11671-010-9547-8Published: 5 February 2010
Highly crystalline Pr6O11 nanorods were prepared by a simple precipitation method of triethylamine complex at 500°C. Synthesized Pr6O11 nanorods were uniformly grown with the diameter of 12–15 nm and the length of 100–150 nm without any impurities of unstable PrO2 phase. The Pr6O11 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 Pr6O11 nanorod electrodes are attributed to the reduction of grain boundaries and high space charge width.