Time-resolved EXAFS investigations of the anodic dissolution of Mo

The corrosion products formed during the anodic polarization of molybdenum in 1M KOH were investigated with time resolved X-ray absorption spectroscop y in the vicinity of the Mo K-edge. Near edge spectra as well as EXAFS scan s extending over approximately 1000 eV above the Mo absorption edge were me asured as a function of the corrosion time. Time dependent values for the c oncentration of the dissolved Mo species in the electrolyte were calculated from the change of the absorption cofficient at the absorption edge. The d etailed analysis pf the XANES and EXAFS data suggests the presence of MoO42 - ions in the solution.