Composite carrier, method for its production and use
By constructing a protective layer of nano-niobium oxide particles and a non-precious metal alloy compound on the surface of a carbon support, the electrochemical corrosion problem of the carbon support in a proton exchange membrane fuel cell is solved, achieving protection across the entire potential range, reducing costs, maintaining a high specific surface area, and improving catalyst stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGZHOU AUTOMOBILE GROUP CO LTD
- Filing Date
- 2026-02-09
- Publication Date
- 2026-06-02
AI Technical Summary
In existing proton exchange membrane fuel cells, carbon supports suffer from electrochemical corrosion under start-up, idling, and long-term operating conditions. Traditional high-temperature graphitization treatment results in high energy consumption and collapse of the pore structure, while precious metal anti-reverse electrode materials are expensive and only effective at high potentials, failing to provide full-cycle protection.
A protective layer of niobium oxide nanoparticles is constructed on the surface of a carbon support using a medium-low temperature process. By competitively adsorbing niobium oxide with free radicals, the oxidative corrosion pathway of the carbon skeleton is blocked. Furthermore, the catalyst stability is enhanced by forming alloys or intermetallic compounds with non-precious metals.
It effectively inhibits corrosion of carbon supports across the entire potential range, reduces material costs, maintains a high specific surface area, improves catalyst stability and durability, and avoids pore damage during high-temperature treatment and the high cost of precious metals.
Smart Images
Figure CN122136377A_ABST