| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Materials for Energy Conversion and Storage 2024
|
| Presentation Title |
Outstanding Performance of Hierarchical Ni-Mn Oxyhydroxide@NiMn Nano-tubular Array Electrocatalysts for Water-splitting at Large Current Density |
| Author(s) |
Harpreet Singh, Arpit Thomas |
| On-Site Speaker (Planned) |
Arpit Thomas |
| Abstract Scope |
Electrochemical water-splitting is a promising technology for the sustainable production of green hydrogen. The large-scale hydrogen production demands electrolyzers to continuously operate at extremely large current densities. Herein, we report an outstanding catalytic performance of bi-functional, NiMn nano-tube array for overall water splitting at large current density upto 1000 mA/cm2 for 200 hours. The nano-tubular array was synthesized via high strain-rate driven nano-moulding of crystalline NiMn alloy. Selective dealloying of nano-tube array resulted in in situ formation of highly active NiMn oxyhydroxide shell on NiMn alloy core. The dealloyed nano-tube array electrode demonstrated an ultra-low overpotential of 175 mV and 276 mV at 500 mA/cm2 for hydrogen evolution reaction and oxygen evolution reaction respectively. The symmetric electrolyser showcased very low cell voltage of 1.78 V only at a large current density of 1000 mA/cm2. The current work provides a unique top-down approach towards developing highly effective catalysts for industrial electrolyzers. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Nanotechnology, |