Cathode electrode for purifying nitrate wastewater to produce ammonia and electrochemical device
By using a proton exchange membrane electrolysis device and a Cu-WO3 electrode, the problem of directly converting natural nitrate waste liquid into ammonia has been solved, achieving high-efficiency ammonia production and high energy conversion efficiency, thus avoiding the shortcomings of traditional methods.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHANGSHU INSTITUTE OF TECHNOLOGY
- Filing Date
- 2026-06-16
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies struggle to efficiently convert nitrate wastewater with natural neutral pH and low ionic strength into ammonia. Furthermore, traditional methods require additional dealkalization treatment, resulting in high processing costs and the potential for OH- alkalization.
A proton exchange membrane electrolysis device is used, which provides H+ through a dilute acid anode and carries out the nitrate reduction to ammonia reaction in the Cu-WO3 cathode electrode layer. The Cu-WO3 electrode is formed by combining the acidic oxide WO3 support and highly catalytically active Cu atoms, which avoids excessive local acidity at the cathode and realizes the direct conversion of nitrate waste liquid into ammonia.
It achieves efficient ammonia production without changing the pH and ionic strength of the waste liquid. The hydrogen evolution reaction is inert, which improves energy conversion efficiency, avoids additional acid and alkali treatment steps, and does not produce hydrogen as a byproduct.
Smart Images
Figure CN122403585A_ABST