TY  - JOUR
AU  - Pasel, Joachim
AU  - Schmitt, Dirk
AU  - Hartmann, Heinrich
AU  - Besmehn, Astrid
AU  - Dornseiffer, Jürgen
AU  - Werner, Jonas
AU  - Mayer, Joachim
AU  - Peters, Ralf
TI  - Combined near-ambient pressure photoelectron spectroscopy and temporal analysis of products study of CH4 oxidation on Pd/γ-Al2O3 catalysts
JO  - Catalysis today
VL  - 360
SN  - 0920-5861
CY  - Amsterdam
PB  - Elsevier
M1  - FZJ-2020-00278
SP  - 444-453
PY  - 2021
AB  - Vehicles that run on natural gas must be equipped with an exhaust gas after-treatment system to burn their unavoidable CH4 slip, which must not be released into the environment as CH4 is a potent greenhouse gas. Pd is known as a highly active catalyst material for CH4 oxidation. For this study, Pd was deposited on a γ-Al2O3 support and the as-received samples were pre-reduced and pre-oxidized, respectively. Near-Ambient Pressure Photoelectron Spectroscopy and the Temporal Analysis of Products methodology were combined to understand that both electronic states, namely PdO and Pd°, are active for the CH4 oxidation reaction, whereby the superior activity of the pre-reduced Pd/γ-Al2O3 catalyst was ascribed to the spill-over of OH-groups from the support to Pd. It was found that the reaction products, CO, CO2 and H2, were strongly and, to a large extent, adsorbed on the catalyst surface and were involved in reversible chemical interactions on the catalyst surface during the CH4 oxidation reaction on the Pd/γ-Al2O3 catalyst.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000594832500006
DO  - DOI:10.1016/j.cattod.2019.12.026
UR  - https://juser.fz-juelich.de/record/872806
ER  -