| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Materials for Energy Conversion and Storage 2025
|
| Presentation Title |
A Novel Catalyst based on Pyrochlore Oxide to Reduce OER Overpotential for Low Temperature Alkaline Water Electrolysis |
| Author(s) |
Aya Okazaki, Hiroto Ohta, Masatsugu Morimitsu |
| On-Site Speaker (Planned) |
Masatsugu Morimitsu |
| Abstract Scope |
Low temperature water electrolysis is one of the promising candidates for green hydrogen production linked to renewable energy solar and wind power generation, and especially alkaline water electrolysis (AWE) has received much attention because of producing low-cost hydrogen without ionic exchange membrane, although the cell voltage of AWE, strongly depending on the overpotential of oxygen evolution reaction (OER) is still needed to reduce to improve the energy efficiency and the running cost of electrolysis. This paper presents a novel OER catalyst based on pyrochlore oxide, which can reduce the overpotential less than 0.1 V in KOH solutions at RT. This implies a possible reduction in voltage up to 15%, compared to the present AWE anodes comprising nickel-based oxide catalysts. The OER kinetics including Tafel slope analysis and the calculations of the crystal and band structures will be also shown. This work was supported by NEDO Project No. JPNP20003. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, |