About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fundamentals of Sustainable Metallurgy and Materials Science
|
| Presentation Title |
Solid–state catalysis in mixed oxide reduction |
| Author(s) |
Dierk R. Raabe |
| On-Site Speaker (Planned) |
Dierk R. Raabe |
| Abstract Scope |
Hydrogen‑driven solid‑state reduction offers a sustainable alternative to fossil‑based pyrometallurgy and enables direct alloy synthesis from mixed oxides. During co‑reduction of oxides, we identify a distinct solid–solid catalytic interaction between pre‑reduced metal and transient oxides that accelerates the overall reduction kinetics by at least a factor of two. This effect arises from dynamic partitioning across evolving metal–oxide interfaces, where continuous interfacial restructuring regenerates catalytic sites that promote H₂ spillover and thereby enhance oxide reduction. The mechanism couples redox thermodynamics with interface‑driven mass exchange, establishing a previously unrecognized catalytic pathway in hydrogen‑based metallurgical reactions. These findings demonstrate that solid‑state hydrogen reduction can integrate oxide reduction, in situ alloying, and microstructure formation in a single step, while leveraging catalytic acceleration to improve process efficiency. Such solid–solid catalytic effects expand the potential of hydrogen‑based alloy production and one-step alloy synthesis. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Pyrometallurgy, Sustainability, Extraction and Processing |