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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Characterization of Materials through High Resolution Coherent Imaging
Presentation Title Nanoscale Imaging of Electrochemically-induced Strain Dynamics in a Locally Polarized Pt Grain
Author(s) Dina Sheyfer, Ruperto Mariano, Tomoya Kawaguchi, Wonsuk Cha, Ross Harder, Mathew Kanan, Stephan Hruszkewycz, Hoydoo You, Matthew Highland
On-Site Speaker (Planned) Dina Sheyfer
Abstract Scope Probing structural rearrangements in catalytic materials during electrocatalysis is challenging experimentally and further complicated by structural heterogeneities including crystalline defects, strain inhomogeneities, and variations in chemical composition. Nonetheless, in operando measurements are often the most direct ways to improve our understanding of catalytic reactions. To address this challenge, we demonstrate a new approach that combines a nanopipette electrochemical cell (NEC) with three-dimensional X-ray Bragg Coherent Diffractive Imaging (BCDI) to study how strain in a single Pt grain evolves in response to applied potential. During electrochemical polarization, in-situ BCDI measurements have revealed marked changes in surface strain arising from the Coulombic attraction between the electrode surface and the electrolyte ions in electrochemical double layers, while the strain in the bulk of the crystal remained unchanged. The concurrent surface redox reactions have a strong influence on the magnitude and nature of the strain dynamics under polarization.
Proceedings Inclusion? Planned:
Keywords Energy Conversion and Storage, Characterization, Thin Films and Interfaces

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

3D Nanoscale Crystalline Microscopy: The Interest of 3D Bragg Ptychography for Material Science
Advances in Phase Retrieval for In Situ Observation of Dislocation Dynamics in Gold Microcrystals
Catalytic Properties at the Nanoscale Probed by Coherent Diffraction Imaging
Characterisation of Material Defects via Plasmon-enhanced Phase Imaging
Coherent Surface Scattering Imaging with Nanometer Resolution for 3D Mesoscale Structures at Surfaces and Interfaces
Exploring the Formation of Superlattice in Metal Nanocrystals using Bragg Coherent X-ray Diffraction Imaging
Fluctuation Analysis of Coherent Electron Diffuse Scattering for Diffractive Imaging
High-speed Free-run Ptychography at the Australian Synchrotron
Imaging Intact Human Organs across the Scales using Hierarchical Phase-contrast Tomography
Imaging Laser Shockwave Dynamics in Defect-bearing Ablator Materials
In Situ and Operando 3D Imaging of Pt and Pd Electrocatalytic Nanocrystals
In Situ Bragg Coherent X-ray Diffraction Imaging Studies
Internal Strain Changes of Pt Nanoparticles in Response to the High Pressure in Diamond-anvil Cell
Method Developments for High-efficient X-ray Coherent Diffraction Imaging
MHz Microscopy at European XFEL
Nanoscale Imaging of Electrochemically-induced Strain Dynamics in a Locally Polarized Pt Grain
Near Atomic Resolution BCDI through Materials Modeling
Precise Registration Algorithm for High-resolution Imaging Applications
Rationalization of CO2 Adsorption on Ni nanocrystals using Bragg Coherent X-ray Imaging
Resolving the Morphology of a Polyphase Solidification Pattern via In-situ Nanotomography
Searching for Crystals, Twins, Peaks and Dislocations with BCDI
Solving Complex Structures with Electron Ptychography
Structural Evolution of Nanoparticles Under Realistic Conditions Observed with Bragg Coherent X-ray Imaging
The Application of Advanced Coherent Imaging Technique and Element Analysis on a Self-organized Loop Structure
Ultrafast Dark-field X-ray Microscopy – A New Tool for Multiscale Analysis
Using Automatic Differentiation to Solve the Phase Problem in X-ray Bragg Ptychography
"Similarity Mapping" Using Precession Electron Diffraction Data

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