Figure 6
Comparison between EXAFS signals obtained from a Pt foil and in situ MEA (cathode: 20% Pt/Vulcan XC-72 powder, Pt loading 1.0 mg cm−2; anode: 30% Pd/Vulcan XC-72 powder, Pd loading 1.0 mg cm−2) at different temperatures and cell potentials. In situ measurements have been obtained with a beam size of 0.4 mm × 5 mm and an integration time per point of 4 s. The dotted lines serve as a guide to the eye. |