About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
|
Energy Materials for Sustainable Development
|
Presentation Title |
Characterizing Coarsening of Single- and Multi-Component Metal Composite Nano-Catalysts for Solid Oxide Fuel Cell Operation |
Author(s) |
Saad Waseem, Edward Sabolsky, Katarzyna Sabolsky, Richard Hart, Seunghyuck Hong, Mingfei Liu |
On-Site Speaker (Planned) |
Saad Waseem |
Abstract Scope |
The objective of this work was to define the morphology and to study the coarsening kinetics of nano-catalysts used for enhanced solid oxide fuel cell (SOFC) operation. Nano-catalyst depositions were performed on flat single crystal surfaces using a bio-inspired surface modification technique. 3D profiles of the nanoparticles at various coarsening stages were obtained using atomic force microscopy (AFM). X-ray photoelectron spectroscopy (XPS) was used to track the changes in composition.
Similar deposition techniques were applied and tested in SOFCs to correlate coarsening kinetics with electrochemical performance. Catalysts used to aid in internal reforming when operating SOFCs on hydrocarbon fuel sources were studied. Cells were evaluated using electrochemical impedance spectroscopy while operating under varying fuel compositions. Post-mortem microstructure and chemistry characterizations were used in analysis. |