A post mortem characterization of the catalyst pellets after the long time-on-stream experiments was carried out using XRD for the bulk structure as well as X-ray photoelectron spectroscopy (XPS) to gain information on the oxidation state of the MOFincorporated Pd. In Furthermore, the catalyst was analyzed by XPS as the Pd 2+ ions as nodes are necessary for the integrity of the metal-organicframework structure. The binding energies of the two discernible spectra components in the Pd 3d detail spectra (Figure ) indicate palladium in the oxidation state +II/oxide form and to a small extent in the metallic state. It can be concluded that for powders as well as pellets the 2+ oxidation state is maintained after catalysis. The ratio Pd 0 / Pd 2+ changed from 0.13 in pristine to 0.29 after a total of 8 h time-on-stream however for the pellets, after several experiments and a total time-on-stream of 60 h, the ratio changed only slightly from 0.09 in pristine to 0.11.