Reductive annealing for generating Se doped 20 wt% Ru/C cathode catalysts for the oxygen reduction reaction
KS Nagabhushana, E Dinjus, H Bönnemann… - Journal of Applied …, 2007 - Springer
KS Nagabhushana, E Dinjus, H Bönnemann, V Zaikovskii, C Hartnig, G Zehl, I Dorbandt…
Journal of Applied Electrochemistry, 2007•SpringerReductive 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 RuCl 3· 2H 2
O on Vulcan XC72 with subsequent conditioning using H 2 at 250° C for 4 h. Surface
treatment of Ru/C by SeO 2 followed by reductive annealing produced Se modified Ru/C
catalysts with a pre-determined Ru: Se= 1: 0.15 and 1: 1 a/o. Structural characterization was
carried out using HRTEM while electrochemical characterization was performed using RDE …
catalysts. Initial preparation of a 20 wt% Ru/C was performed by impregnating RuCl 3· 2H 2
O on Vulcan XC72 with subsequent conditioning using H 2 at 250° C for 4 h. Surface
treatment of Ru/C by SeO 2 followed by reductive annealing produced Se modified Ru/C
catalysts with a pre-determined Ru: Se= 1: 0.15 and 1: 1 a/o. Structural characterization was
carried out using HRTEM while electrochemical characterization was performed using RDE …
Abstract
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 with a pre-determined Ru:Se = 1:0.15 and 1:1 a/o. Structural characterization was carried out using HRTEM while electrochemical characterization was performed using RDE measurements. It is concluded that the presence of Se on Ru has a positive effect on the oxygen reduction reaction of RuSe/C catalyst systems with an optimal loading of Se close to a Ru:Se ratio of 1:0.15 a/o. Overloading of selenium led to neutralization of its promoting effect.
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