Electrochemical conversion of nitrate into ammonia offers a method for mitigating nitrate pollution in water. Here the authors report the electrochemical nitrate-to-ammonia conversion using high-entropy oxide Mg0.2Co0.2Ni0.2Cu0.2Zn0.2O and find that the Co spin states are crucial for synergistic ammonia generation.
- Shengnan Sun
- Chencheng Dai
- Zhi Wei Seh