Electrochemical Catalyst–Support Effects and Their Stabilizing Role for IrO x Nanoparticle Catalysts during the Oxygen Evolution Reaction

Redox-active support materials can help reduce the noble-metal loading of a solid chemical catalyst while offering electronic catalyst-support interactions beneficial for catalyst durability. This is well known in heterogeneous gas-phase catalysis but much less discussed for electrocatalysis at electrified liquid-solid interfaces. Here, we demonstrate experimental evidence for electronic catalyst-support interactions in electrochemical environments and study their role and contribution to the corrosion stability of catalyst/support couples. Electrochemically oxidized Ir oxide nanoparticles, supported on high surface area carbons and oxides, were selected as model catalyst/support systems for the…

• DF
  Deutsche Forschungsgemeinschaft

  Awards: STR 596/3-1, STR 596/4-1