| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Processing and Kinetic Phenomena: From Thin Films and Micro/Nano Systems to Advanced Manufacturing
|
| Presentation Title |
Nano-Metallurgy for Renewable Energy Conversion |
| Author(s) |
Young-Chang Joo, Dae-Hyun Nam |
| On-Site Speaker (Planned) |
Young-Chang Joo |
| Abstract Scope |
Electrochemical hydrogen evolution reaction (HER) and carbon dioxide reduction reaction (CO2RR) enable the conversion of water to hydrogen (H2) and CO2 to value-added fuels and feedstocks. At the heart of renewable energy conversion is the heterogeneous electrocatalyst, a material which activates substrate species and interacts with reaction intermediates. We developed a methodology to control the phase and structures of metal active materials in carbon supporter by thermodynamic redox control during calcination. We found that metals and carbon have different oxidation tendencies and this can be predicted by the Gibbs free energy (∆G) in Ellingham diagram. Starting from understanding the redox tendency in multi-atomic system, we discovered a processing window in phase diagram to induce selective reaction between specific elements such as selective carbon oxidation and metal reduction. This enabled the optimization of structure and phase of metal/carbon-based catalysts for highly efficient water and CO2 electrolysis. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Nanotechnology, Phase Transformations |