Artículo
Tomographic Heating Holder for In Situ TEM: Study of Pt/C and PtPd/Al2O3 Catalysts as a Function of Temperature
Autor/es | Cervera Gontard, Lionel
Dunin Borkowski, Rafal E. Fernández Camacho, Asunción Ozkaya, Dogan Kasamac, Takeshi |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica |
Fecha de publicación | 2014 |
Fecha de depósito | 2018-04-17 |
Publicado en |
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Resumen | A tomographic heating holder for transmission electron microscopy that can be used to study supported catalysts at temperatures of up to ~1,500°C is described. The specimen is placed in direct thermal contact with a tungsten ... A tomographic heating holder for transmission electron microscopy that can be used to study supported catalysts at temperatures of up to ~1,500°C is described. The specimen is placed in direct thermal contact with a tungsten filament that is oriented perpendicular to the axis of the holder without using a support film, allowing tomographic image acquisition at high specimen tilt angles with minimum optical shadowing. We use the holder to illustrate the evolution of the active phases of Pt nanoparticles on carbon black and PtPd nanoparticles on ¿-alumina with temperature. Particle size distributions and changes in active surface area are quantified from tilt series of images acquired after subjecting the specimens to increasing temperatures. The porosity of the alumina support and the sintering mechanisms of the catalysts are shown to depend on distance from the heating filament. |
Agencias financiadoras | European Union (UE) |
Identificador del proyecto | REGPOT-CT-2011-285895-Al-NANOFUNC
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Cita | Cervera Gontard, L., Dunin Borkowski, R.E., Fernández Camacho, A., Ozkaya, D. y Kasamac, T. (2014). Tomographic Heating Holder for In Situ TEM: Study of Pt/C and PtPd/Al2O3 Catalysts as a Function of Temperature. Microscopy and Microanalysis, 20, 982-990. |
Ficheros | Tamaño | Formato | Ver | Descripción |
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Tomografic heating.pdf | 1.993Mb | ![]() | Ver/ | |