Journal Article

FZJ-2020-00278

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Combined near-ambient pressure photoelectron spectroscopy and temporal analysis of products study of CH4 oxidation on Pd/γ-Al2O3 catalysts

Pasel, J. (Corresponding author)FZJ* ; Schmitt, D.FZJ* ; Hartmann, H.FZJ* ; Besmehn, A.FZJ* ; Dornseiffer, J.FZJ* ; Werner, J. ; Mayer, J.FZJ* ; Peters, R.FZJ*

2021
Elsevier Amsterdam

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Please use a persistent id in citations: http://hdl.handle.net/2128/26561  doi:10.1016/j.cattod.2019.12.026

Abstract: 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.

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Contributing Institute(s):

1. Elektrochemische Verfahrenstechnik (IEK-14)
2. Analytik (ZEA-3)
3. Materialwissenschaft u. Werkstofftechnik (ER-C-2)

Research Program(s):

1. 135 - Fuel Cells (POF3-135) (POF3-135)
2. 131 - Electrochemical Storage (POF3-131) (POF3-131)
3. 1232 - Power-based Fuels and Chemicals (POF4-123) (POF4-123)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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