Preparation method of amorphous IrOx / Ru catalyst for PEM water electrolysis to produce hydrogen
By preparing amorphous IrOx/Ru catalysts, the problems of poor stability and high cost of iridium in PEM water electrolysis hydrogen production technology were solved, efficient and low-cost catalyst application was achieved, the amount of precious metal iridium used was reduced, and the activity and stability of the catalyst were improved.
Patent Information
- Application Number
- CN202310022238.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-01-07
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2043-01-07
AI Technical Summary
In the existing PEM water electrolysis hydrogen production technology, the anode catalyst iridium has poor stability and high cost, resulting in a surge in catalyst manufacturing costs. It is necessary to reduce the amount of precious metal iridium and improve the activity and stability of the catalyst.
A highly active and stable catalyst was prepared by adding sodium nitrate to a mixture of iridium salt and ruthenium powder, followed by ultrasonic treatment, constant temperature heating, and calcination. The iridium content was reduced, and the synergistic effect of ruthenium was utilized to enhance the catalyst activity.
The amorphous IrOx/Ru catalyst has high OER activity under acidic conditions, low cost, and exhibits good stability and catalytic activity in the PEM water electrolysis hydrogen production system. The iridium content is only 50% of commercial IrO2, which reduces cost and improves activity.