Reductive annealing for generating Se doped 20 wt Ru C cathode catalysts for oxygen reduction reaction

Reductive annealing was chosen as a method for the syntheses of Se modified Ru C catalysts. Initial preparation of a 20 wt Ru C was performed by impregnating RuCl3.2H2O on Vulcan XC72 with subsequent conditioning using H2 at 250 C for 4 h. Surface treatment of Ru C by SeO2 followed by reductive annealing produced Se modified Ru C catalysts having Ru Se 1 0.15 and 1 1 a o. Physical characterization was performed using HRTEM while electrochemical characterization was performed using RDE measurements. From the results it is concluded that presence of Se on Ru has the positive effect in the ORR of RuSe C catalyst systems with an optimal loading of Se close to Ru Se ratio of 1 0.15 a