| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Temperature Electrochemistry: An FMD Symposium Honoring Uday B. Pal
|
| Presentation Title |
Highly Active and Thermally Stable Single-atom Electrocatalysts for High-temperature Solid Oxide Cells |
| Author(s) |
Kyung Joong Yoon |
| On-Site Speaker (Planned) |
Kyung Joong Yoon |
| Abstract Scope |
Single-atom catalysts provide unique catalytic properties and maximize atom utilization efficiency. While utilizing them at elevated temperatures is highly desirable, their operating temperature is usually kept below 300°C to prevent isolated atoms from agglomerating. Herein, we present single-atom Pt/ceria nanocatalysts that are highly active and thermally stable in solid oxide cell (SOC) operating at 600-800°C. The urea-based chemical solution process creates strong Pt–O–Ce interactions that securely anchor isolated Pt atoms to the surface of ceria nanoparticles. These single-atom Pt/ceria nanocatalysts are loaded in the oxide fuel electrode of SOC via in situ synthetic process. This electrode substantially outperforms the state-of-the-art Ni-based fuel electrode and delivers extremely high performance in fuel cell and electrolysis modes. Furthermore, it stably operates at 700°C for over 500 h under realistic operating conditions. Our results provide guidance to resolve the critical issues for the practical use of single-atom catalysts in high-temperature energy devices. |
| Proceedings Inclusion? |
Planned: |