Quantitative Electron Microscopy Studies of Metal Nanoparticle Catalysts: Nanostructure, Support Interaction and Ageing Effects
Doktorsavhandling, 2017
CO oxidation
strain
ageing
specimen preparation
scanning electron microscopy (SEM)
FIB/SEM
supported nanoparticle catalyst
transmission electron microscopy (TEM)
particle size distribution (PSD)
platinum
Författare
Torben Nilsson Pingel
Chalmers, Fysik, Eva Olsson Group
The effect gas composition during thermal aging on the dispersion and NO oxidation activity over Pt/Al2O3 catalysts
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Pt Nanoparticle Sintering and Redispersion on a Heterogeneous Nanostructured Support
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Nilsson Pingel, T., Jørgensen, M., Yankovich, A. B., Grönbeck, H., Olsson, E., Influence of Strain Patterns on Catalytic Activity of Supported Nanoparticles
In this thesis, we investigated the three-dimensional structure of catalysts on the nanoscale and obtained new insights about how variations on the atomic scale impact their catalytic properties. In order to reach these conclusions, we used electron microscopy to study the metal nanoparticles. These microscopes use electrons instead of light, reaching a resolution more than a thousand times higher than the best conventional light microscopes and allowing us to image individual atoms and their positions with high precision.
The results that we obtained improve the understanding of complex catalyst systems and indicate ways to tailor their nanoscale structure in order to enhance their performance and establish a more efficient use of material resources. The development of better catalysts is a critical challenge on the way to a sustainable society, which relies on green energy, efficient processes and reduced air pollution.
Styrkeområden
Nanovetenskap och nanoteknik (SO 2010-2017, EI 2018-)
Materialvetenskap
Ämneskategorier
Fysik
Kemi
ISBN
978-91-7597-623-5
Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie: 4304
Utgivare
Chalmers
Kollektorn, MC2, Kemivägen 9
Opponent: Dr. Sarah Haigh, School of Materials, The University of Manchester