The nitrogen doped carbon nanotubes (NCNTs) were prepared by chemical vapor deposition (CVD) using 900℃ or 950℃. The ruthenium selenide (Ru₈₅Se₁₅) nanoparticles supported on NCNTs were then synthesized through microwave assisted route. It was found that the amorphous Ru₈₅Se₁₅ nanoparticles were uniformly distributed on NCNTs with no apparent particle agglomeration being observed. The as-prepared Ru₈₅Se₁₅/NCNTs exhibited high electrocatalytic activity toward oxygen reduction reaction and relatively good stability. The half-wave potentials reached 0.57 ~ 0.58 V and nearly 50 mV degradation was observed upon 1400 cycles by voltammetry in 0.5 mol L^-1 sulfate acid solutions.