Electron Microscopy of Catalysts
Scientific Organiser: Dogan Ozkaya, Johnson Matthey Technology Centre
Microscopy and catalysis is going through a tremendous transformation on many fronts. Quantitative imaging (atom counting) and tomographic techniques are coming up with nanoparticle structures that are being used by modellers to predict activity and selectivity, EDX and EELS are delivering not just compositional information but also chemical state maps. In situ techniques and holders have developed in a way that encourages exploiting of multi technique, through the lengthscale characterisation.There will also be a chance to see the new I14 nanoprobe beamline together with EPSIC facilities in Diamond Light Source at Harwell.
- 09:30Registration, welcome and coffee/tea
- 10:00Session 1 Quantitative Imaging
Welcome address - Dogan Ozkaya, Johnson Matthey
- 10:10From high precision imaging to high-performance computing: Leveraging ADF-STEM Atom-counting and DFT for catalyst Nano-metrology - Lewys Jones, University of Dublin
- 10:40Quantifying catalyst nanoparticles using ADF, EELS and EDX - Aakash Varahmbia, Oxford University
- 11:00Predicting the Oxygen-Binding properties of platinum nanoparticles by combining high-precision Electron Microscopy and density functional theory calculations - Chris Skylaris, University of Southampton
- 11:30Atomic scale 3d characterisation of nanomaterials by quantitative scanning transmission electron microscopy - Sandra Van Aert, University of Antwerp
- 12:00Studying catalysis using In Situ TEM Gas Supply by DENSsolutions - David Westmoreland, Quantum Design UK & Ireland Ltd
- 12:20Buffet lunch, posters and Epsic visit
- 13:50Session 2 Analytical Microscopy
SuperSTEM EELS application to catalyst - Quentin Ramasse, SuperSTEM
- 14:20''Stop-Start” electron microscopy: New insights into deactivation mechanism of Au/CeZrO4 for low temperature water-gas shift reaction - Qian He, Cardiff University
- 14:40Applications of aberration-corrected transmission electron microscopy to the atomic study of environmental catalysts including activated hydrogen-storage waxes through microwave-assisted catalytic decomposition- Emanuela Liberti, University of Antwerp
- 15:10Afternoon tea/coffee
- 15:30Session 3 in-situ and correlative microscopy
Imaging catalyst structures and dynamics by high resolution and in-situ scanning transmission electron microscopy - Nigel Browning, University of Liverpool
- 16:00TEM environmental study of magnetite nanoparticle formation and phase determination - Leonardo Lari, The York JEOL Nanocentre
- 16:20Opportunities for combined x-ray and electron microscopy studies of catalysts - Paul Quinn, Diamond Light Source
- 16:50Transmission X-ray microscopy (TXM) studies of in-situ nanoparticle growth and corrosion - Angela Goode, Imperial College London
- 17:30Close of the meeting
Sandra van Aert
University of Antwerp
Sandra Van Aert received her Ph.D. at the Delft University of Technology (The Netherlands) in 2003. Thereafter, she joined the Electron Microscopy for Materials Research (EMAT) group of the University of Antwerp (Belgium) where she became a senior lecturer in 2009 and professor in 2016. Her research focuses on new developments in the field of model-based electron microscopy using statistical parameter estimation theory. This enables one to measure unknown structure parameters with high accuracy and precision from electron microscopy signals. In this manner, all information contained in an atomic resolution image can be assessed quantitatively. This method to analyze experimental images allows one to measure 2D atomic column positions with subpicometer precision, to measure compositional changes at interfaces, to count atoms in an atomic column with single atom sensitivity, to unscramble mixtures of elements, and to reconstruct 3D structures with atomic resolution. In 2011, she received the European Microscopy Society Outstanding Paper Award and in 2017 she obtained the Ernst Ruska Prize for achievements on ‘New techniques for optimum quantitative analysis of electron microscopy data’.
University of Liverpool
Dr Lewys Jones FRMS
University of Dublin
After a first degree in Material Science, I received my PhD from the Department of Materials at the University of Oxford in 2013. This focussed on two themes; scanning stability in the aberration-corrected scanning transmission electron microscope (AC-STEM) and also on applications of focal series of annular dark-field data. In 2014 a software plug-in for Digital Micrograph to correct scan-noise (the Jitterbug software) was launched in collaboration withHREM Research. More recently in 2016, another plug-in to bring fast non-rigid registration to DM was launched (SmartAlign).
I sit on the Editorial Board of the journal Advanced Structural and Chemical Imaging, and have been a Fellow of the Royal Microscopical Society since 2015.
University of Oxford
Emanuela completed her PhD in Materials at Imperial College London. During her PhD, she worked on the characterisation of oxide photocatalyst nanostructures using aberration-corrected transmission electron microscopy (TEM) including exit wavefunction restoration, as well as a combination of scanning transmission electron microscopy (STEM) and electron energy-loss spectroscopy (EELS).
In 2013, Emanuela joined the Department of Materials in Oxford as a Post Doctoral researcher under the ESTEEM EU fp7 program. Her research involved the development of methods for the quantification and interpretation of aberration-corrected transmission electron microscopy images, using techniques such as focal and tilts series recovery of the specimen exit wave function, and imaging simulations for applications in environmental catalysis.
In 2017, Emanuela joined the electron Physical Imaging Centre (ePSIC) team as an electron microscopy scientist and Post Doctoral Research Fellow of the Oxford Materials group. Her role includes supporting users research and data analysis, as well as conducting her own research on quantitative TEM of catalytic systems and energy materials.
Prof Quentin Ramasse
Quentin Ramasse is the Director of the SuperSTEM Laboratory, the EPSRC UK National Facility for Aberration-Corrected STEM, and holds a visiting associate Professorship at the University of Leeds, U.K. He obtained his Ph.D. in Physics from the University of Cambridge as a member of the Microstructural Physics Group working on optical aberration measurements methodologies for aberration-corrected STEM. Before taking up his post at SuperSTEM he held a Staff Scientist position at the National Center for Electron Microscopy (NCEM) in Berkeley, a U.S. Department of Energy-funded user facility where he took part in the TEAM project which saw development of the world's first 0.5A electron microscope. Quentin Ramasse has published extensively in the field of STEM-EELS, with a dual focus on STEM technique development and on applications to a wide range of energy harvesting materials, from 2-dimensional materials such as graphene and MoS2 nano-catalysts to complex oxides.
Diamond Light Source
University of Southampton
Electron Microscopy of Catalysts is taking place at the Diamond Light Source, Harwell Science and Innovation Campus, Oxfordshire
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