In situ X-ray powder diffraction study on flame-made undoped and Pd-doped LaCoO3
Flame-spray pyrolysis (FSP) is an efficient method for the synthesis of multi-component nanomaterials and has been recently widely applied for the preparation of heterogeneous catalysts [1-3]. The rapid quenching after the FSP process typically affords materials with high surface area and tunable structural and chemical properties. Recently, perovskites such as LaCoO3 and SrTi0.9Ag0.1O3 have been prepared . In the present study, we investigated undoped and Pd-doped LaCoO3. The latter is a potential catalyst for NOx-removal by selective catalytic reduction (SCR) and we thus explored the stability of LaCoO3 in oxidizing and reducing atmosphere in the presence or absence of palladium . Thermogravimetric investigations demonstrated a strong difference between the two materials. Since the catalyst and particularly the cobalt constituent reoxidized during air exposure, ex situ studies could not unravel the changes in structure. For this pupose, in situ diffraction and spectroscopic studies were required Show more
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Journal / seriesHASYLAB Jahresbericht
Pages / Article No.
Organisational unit03285 - Baiker, Alfons (emeritus)
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