About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Functional Nanomaterials: Functional Low-dimensional Materials (0D, 1D, 2D) Driving Innovations in Electronics, Energy, Sensors, and Environmental Engineering and Science 2021
|
Presentation Title |
Unveiling the Origin of Morphological Instability in Topologically Complex Electrocatalytic Nanostructures |
Author(s) |
Ian Mccue, Yawei Li, Zhiyong Xia, Joshua Snyder |
On-Site Speaker (Planned) |
Ian Mccue |
Abstract Scope |
Three-dimensionally complex, nano-architectured catalysts offer disruptive advances in electrochemical energy storage and conversion technologies, owing to their high surface-to-volume ratios and large pore volumes. However, these topologically complex electrocatalytic materials, especially nanoporous metals, have intrinsically metastable morphologies and degrade rapidly in service. In this study, we explored the morphological evolution of nanoporous alloy nanoparticles, and highlight the limiting atomic process of coarsening that governs degradation in nanoporous structures. Notably, through the combination of quantitative and qualitative experimental and computational metrics, this is the first instances that electrochemical coarsening was deconvoluted into distinct surface diffusion and dissolution events. Insights from this work will have a measurable impact on the effort to bridge the gap between highly active and highly stable materials. Integration of these morphologically stable, yet complex and active, electrocatalysts into electrochemical energy conversion and storage devices will yield significant improvements in both precious metal loading and operational longevity. |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, Modeling and Simulation, Nanotechnology |