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

K. S. Nagabhushana, E. Dinjus, H. Bönnemann, V. Zaikovskii, C. Hartnig, G. Zehl, I. Dorbandt, S. Fiechter, P. Bogdanoff

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21 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1515-1522
Number of pages8
JournalJournal of Applied Electrochemistry
Volume37
Issue number12
DOIs
Publication statusPublished - 01-12-2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Chemistry
  • Electrochemistry

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