22 research outputs found
Study of Oâ and OH adsorption energies on Pd-Cu alloys surface with a quantum chemistry approach
Palladium-copper alloys as catalysts for the oxygen reduction reaction in an acidic media I: Correlation between the ORR kinetic parameters and intrinsic physical properties of the alloys
Investigations of Pd-Cu electrocatalyst for oxygen reduction reaction in acidic media with RDE method
Synthesis and characterization of electrocatalysts for the oxygen evolution in PEM water electrolysis
International audienceIrO, IrSnO (x = 0.7, 0.5) and IrRuO (x = 0.7, 0.5) electrocatalysts for the oxygen evolution reaction (OER) have been synthesized using the Adams fusion method. The metal oxides were characterized via X-ray diffraction, scanning electron microscopy, inductively coupled plasmaâatomic emission spectrometry and nitrogen adsorptionâdesorption measurements to have information about their crystallographic structure, chemical composition and morphology, respectively. A controlled bulk molar fraction of Ru or Sn was introduced in the IrO2 lattice during the synthesis with no phase separation. The electrocatalytic activity of the synthesized oxides in the OER was studied in liquid electrolyte using porous rotating-disk electrodes, in âhalf-cellâ configuration and in a 5 cm proton-exchange membrane water electrolysis cell. An increase of the electrical performance was observed upon Ru insertion and a severe depreciation upon Sn insertion