Synthesis of praseodymium hydroxide (Pr(OH)3) and praseodymium oxide (Pr6O11) nanorods via room temperature aging

► Investigated room temperature aging for preparing Pr(OH)3 and Pr6O11 nanorods. ► Nanorod structure was different to that produced by hydrothermal processing. ► Pr6O11 nanorods show crystal faceting favorable for high catalytic activity.