MoxSey-(CO)n electrocatalyst was prepared by screen printing Mo(CO)(6) + Se mixture and subsequent sintering of the same at 250 degrees C in air as well as in Se atmosphere in a tubular furnace. 0978.msi 0978.qrt contents.3t figurelist.txt The catalyst was characterized using techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), voltametry and polarization (current-potential) measurements. The results indicated that screen printed MoxSey-(CO)n is near amorphous in nature and possesses appreciable catalytic activity for oxygen reduction reaction in acid electrolyte (H2SO4) The catalytic particles are formed with porous nature and varying compositional zones. The electrocatalytic activity seems to diminish with Se incorporation in the lattice of the Mo-carbonyl clusters formed during sintering.