About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Materials for Energy Conversion and Storage 2026
|
| Presentation Title |
Tuning Hydrogen Evolution and Oxygen Reduction Electrocatalysis in multi-component Pt₄FeCoCuNi Intermetallics via Chemical Ordering |
| Author(s) |
Yong Wang |
| On-Site Speaker (Planned) |
Yong Wang |
| Abstract Scope |
Disordered solid-solution high-entropy alloys (HEAs) have been extensively studied as electrocatalysts, while their ordered intermetallic counterparts remain largely unexplored. In this work, multicomponent Pt₄FeCoCuNi nanoparticles with tunable degrees of atomic ordering are synthesized to investigate the impact of chemical ordering on electrocatalytic performance. The disorder-to-order transformation mechanism is revealed at the single-particle level and confirmed by selected-area electron diffraction and X-ray diffraction. A strong correlation is observed between catalytic performance and both the crystal and electronic structures. Notably, the highly ordered Pt₄FeCoCuNi nanoparticles exhibit the highest mass activities toward acidic oxygen reduction reaction (ORR) and alkaline hydrogen evolution reaction (HER), showing 18.9-fold and 5.6-fold enhancements over commercial Pt/C, respectively. They also demonstrate superior long-term stability compared to partially ordered and disordered counterparts. These findings underscore atomic ordering as a key design parameter, offering valuable guidance for developing advanced multicomponent intermetallic catalysts. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, High-Entropy Alloys, Characterization |