Jan-Dierk Grunwaldt et al 2009 J. Phys.: Conf. Ser. 190 012160 doi:10.1088/1742-6596/190/1/012160
Jan-Dierk Grunwaldt1,5, Niels van Vegten2, Alfons Baiker2 and Wouter van Beek3,4
Show affiliationsThe structure of palladium during the total combustion of methane has been studied by a combination of the complementary in situ techniques X-ray absorption spectroscopy, Raman spectroscopy and X-ray diffraction. The study demonstrates that finely dispersed and oxidized palladium is most active for the oxidation of methane. Upon heating in the reaction mixture a sudden reduction accompanied by strong sintering of the palladium particles occurs leading to a less active catalyst. Raman spectroscopy combined with XAS shows that palladium is re-oxidized during cooling but is not as finely dispersed as in its prepared state.
82.30.-b Specific chemical reactions; reaction mechanisms
78.30.-j Infrared and Raman spectra
61.66.-f Structure of specific crystalline solids
82.33.Vx Reactions in flames, combustion, and explosions
78.70.Dm X-ray absorption spectra
82.80.Ej X-ray, Mössbauer, and other gamma-ray spectroscopic analysis methods
Condensed matter: electrical, magnetic and optical
Issue 1 (2009)
Jan-Dierk Grunwaldt et al 2009 J. Phys.: Conf. Ser. 190 012160
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