SEARCH

SEARCH BY CITATION

Keywords:

  • alkaline electrolytes;
  • cobalt oxides;
  • electrocatalyst;
  • fuel cells;
  • oxygen reduction reaction
Thumbnail image of graphical abstract

Same selectivity hides different pathways: The same apparent 4-electron process for the oxygen-reduction-reaction hides different pathways over carbon-supported cobalt oxide catalysts depending on the potential. At low overpotentials, the ORR intermediate HO2 preferably disproportionates to oxygen, whereas at high overpotentials the disproportionation and reduction reaction occur in parallel.