About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Single- and Multi-Component Metal Composite Nano-Catalysts for Enhanced Solid Oxide Fuel Cell Operation in Hydrocarbon Fuels |
| Author(s) |
Saad Waseem, Edward M Sabolsky, Katarzyna Sabolsky, Seunghyuck Hong, Mingfei Liu, Richard Hart |
| On-Site Speaker (Planned) |
Saad Waseem |
| Abstract Scope |
The objective of this work was to investigate methods to increase the performance and stability of solid oxide fuel cells (SOFCs) with Ni-based anodes operating on hydrocarbon containing fuels. Standard Ni-YSZ anodes show significant degradation that leads to failure due to deactivation and carbon build-up within the electrode. Uniform incorporation of metal composite nano-catalysts into the anode microstructure was achieved through a surfactant-enhanced liquid phase infiltration process. Nano-catalyst deposition was initially characterized on flat surfaces to define the morphology of the coatings and to study nano-catalyst microstructure/chemistry evolution over operation time using atomic force microscopy (AFM).
Impregnated SOFCs were evaluated using electrochemical impedance spectroscopy while operating under high methane fuel streams. Fuel compositions were selected to have high hydrocarbon content to accelerate degradation. Deposition techniques were optimized for multi-component internal reforming catalysts to obtain sustained performance enhancement. Post-mortem microstructure and chemistry characterizations were used in analysis. |