| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Materials for Energy Conversion and Storage VI
|
| Presentation Title |
A Durable, Inexpensive Oxygen Reduction Reaction Electrocatalyst |
| Author(s) |
Rohan Mishra, Sung Beom Cho, Cheng He, Arashdeep Singh Thind, Shrihari Sankarasubramanian, Vijay Ramani |
| On-Site Speaker (Planned) |
Rohan Mishra |
| Abstract Scope |
Current proton exchange fuel cells employ platinum-group-metal nanoparticles dispersed on carbon-based supports as catalysts for oxygen reduction reaction (ORR), and are hence expensive. Furthermore, the use of carbon-based support results in catastrophic failure during repeated start-up/shut-down events due to the irreversible corrosion of carbon. To overcome these issues, we employed an approach based on first-principles calculations to rapidly screen through a large set of transition metal-nitrogen clusters (TMN) on corrosion-resistant TiC supports that have a good combination of stability, surface area and conductivity. We predict FeN4 clusters on TiC support to be an inexpensive and durable catalyst having better performance than TMN clusters on carbon supports. This catalyst formulation was obtained by developing a scaling relation based on the electrostatic interactions between the TiC support and the TMN clusters. We will discuss the process used to screen the catalysts and experimental results demonstrating their performance. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |