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Preparation and characterisation of Pt/Al2O3 aerosol precursors as model Pt-emissions from catalytic converters

MPS-Authors
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Rühle,  Thomas
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Schneider,  H.
Fritz Haber Institute, Max Planck Society;

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Find,  Josef
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Herein,  Daniel
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Pfänder,  Norbert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Wild,  Ute
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Rühle, T., Schneider, H., Find, J., Herein, D., Pfänder, N., Wild, U., et al. (1997). Preparation and characterisation of Pt/Al2O3 aerosol precursors as model Pt-emissions from catalytic converters. Applied Catalysis B: Environmental, 14(1-2), 69-84. doi:10.1016/S0926-3373(97)00013-1.


Cite as: http://hdl.handle.net/21.11116/0000-0008-EE8E-D
Abstract
A model catalyst to simulate inorganic emissions from automotive catalyst was developed to study the toxicological potential of platinum particles. A 3–5% system Pt/Al2O3 was selected in order to achieve sufficient analytical sensitivity in later toxicological studies. A genuine support material (alumina), which was used in industrial automotive catalyst production, was impregnated, calcined and activated. The preparation procedure was optimised in a series of experiments in order to fulfil the special conditions imposed by the toxicology testing program. As the toxicological investigations represent a separate program, these experiments will not be discussed here but in separate work to be published by the co-authors. Sample were characterised by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), X-ray-photoelectron spectroscopy (XPS) and X-ray fluorescence analysis (XRFA). Furthermore, the thermal effects during activation were studied by differential scanning calorimetry (DSC) and by thermogravimetry/differential thermoanalysis (TG/DTA). The catalytic activity of the sample was tested using a CO oscillation as model reaction, investigated by ion-molecule mass spectrometry (IMR-MS). All experimental results, including the catalytic activity, prove the authenticity of the sample as a real automobile catalyst.