Tóm tắt: Different carbon-supported nano-electrocatalysts – Pt/C, Pt-Pr6O11(particle)/C and Pt-Pr6O11(rod)/C were successfully prepared. By various electrochemical characterization methods, it was demonstrated that the Pr6O11 nanorods have a promotion role for ethanol electrooxidation catalyzed by Pt/C. However, according to stripping experiment, the promotion effect of Pr6O11 does not result from the easier electrooxidation of intermediate adsorbates on Pt-Pr6O11/C than on Pt/C. It was supposed that Pr6O11 could promote a certain step in ethanol oxidation reaction, and especially the special morphology of the nanorods could further enhance the activity compared with nanoparticles.