Figure 6.

XANES at the Ir L3-edge. (A) Comparison of the Ir L3-edge white line for iridium reference materials and Ir-MnOx catalysts. Edge shifts were examined for (B) IrO2 nanoparticles, (C) Irsingle-MnOx, and (D) Ircluster-MnOx under applied anodic potential. The potentials are 85% iR-compensated.