Fig. 4: In situ Pd K-edge XANES and EXAFS data.
From: Investigation of the evolution of Pd-Pt supported on ceria for dry and wet methane oxidation
XANES spectra of a Pd-CeO2 MM, b PtPd-CeO2 MM, and c PdPt/CeO2 IWI after the TPC1173 treatment under dry and wet lean methane combustion conditions. The state at the beginning of the wet measurements at 723 K and after 2 h are shown, the latter marked with *. Magnitude of the FT of the EXAFS spectra of d Pd-CeO2 MM, e PtPd-CeO2 MM, and f PdPt/CeO2 IWI after the TPC1173 treatment under dry and wet lean methane combustion conditions at 723 K. The state at the beginning of the wet measurements at 723 K and after 2 h are shown, the latter marked with *. g overlay of the magnitude of the FT of the EXAFS spectra of the three samples after 2 h under the wet methane combustion atmosphere at 723 K. Reference data of a Pd foil and a PdO standard are also shown. MM mechanical milling, IWI incipient wetness impregnation.
