Journal Article

PUBDB-2021-03074

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Comparison of the Catalytic Performance and Carbon Monoxide Sensing Behavior of Pd-SnO$_2$ Core@Shell Nanocomposites

Ogel, E.Extern* ; Müller, S. A. ; Sackmann, A. ; Gyger, F. ; Bockstaller, P. ; Brose, E. ; Casapu, M.Extern* ; Schöttner, L. ; Gerthsen, D. ; Feldmann, C.Extern* ; Grunwaldt, J.-D. (Corresponding author)Extern*

2017
WILEY-VCH Verlag Weinheim

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Please use a persistent id in citations: doi:10.1002/cctc.201601132

Abstract: The catalytic activity of Pd-SnO$_2$ core@shell nanocomposites in the oxidation of CO and their CO-sensing behavior were compared. For this purpose, Pd particles were placed on the inside and the outside of SnO$_2$ hollow spheres, as demonstrated by electron tomography, X-ray photoelectron spectroscopy, and X-ray absorption spectroscopy. Both the sensing and catalytic effect were studied in a systematic manner on such nanocomposites, and striking differences in the catalytic performance of the nanocomposites in CO oxidation and CO and H$_2$ sensing were found. At low temperatures, SnO$_2$@Pd was found to be a good sensor, and the light-off temperature was significantly lower than that of Pd@SnO$_2$. Above the ignition temperature, CO was probably rapidly removed from the gas so that the sensing effect disappeared. This demonstrated that understanding of the sensing and catalytic behavior can help in unraveling the functional properties of core@shell and Pd-SnO$_2$ nanocomposites in more detail.

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Contributing Institute(s):

1. FS-Photon Science (FS-PS)

Research Program(s):

1. 899 - ohne Topic (POF4-899) (POF4-899)

Experiment(s):

1. DORIS Beamline X1 (DORIS III)

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

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