| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Functional Nanomaterials 2020: Translating Innovation into Pioneering Technologies
|
| Presentation Title |
In-situ Grown Metal Nanoparticle Catalysts: Properties and Control |
| Author(s) |
Tae-Sik Oh |
| On-Site Speaker (Planned) |
Tae-Sik Oh |
| Abstract Scope |
The ability to produce supported metal nanoparticle catalysts via exsolution from a perovskite type oxide support under reducing conditions has been known for some time and is used in some formulations of automotive emissions control catalysts. While this phenomenon is well known, the mechanism by which the transition metal is exsolved from the oxide host is still poorly understood. The relationships between the exsolution process and the resulting structure of the metal nanoparticles are also not well understood. In this talk I will discuss our recent mechanistic studies of the exsolution process. Using well-defined model systems and detailed structural analysis by electron microscopy and atomic force microscopy, the nucleation and exsolution of Ni particles from Ni-doped strontium titanate was monitored. These studies show how exsolution produces unique surface structures consisting of metal particles partially submerged in pits on the oxide surface. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |