在Mo2C上固定的单原子Cu能增强酸电还原到氨的作用
Guohui Wang1, Ruiyuan Ma2, Nana Zhang1
1School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China. chuk630@mail.lzjtu.cn.
概括
在Mo2C上的单原子铜通过电催化有效地将化物转化为氨. 这种新型催化剂实现了高氨产量和选择性,抑制了不必要的进化反应.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 电化学化物降解为氨 (NO2RR) 是一个有前途的可持续氨生产途径.
- 开发高效和选择性的电催化剂对于推进NO2RR技术至关重要.
研究的目的:
- 设计和研究在碳化 (Cu1/Mo2C) 上固定的单原子铜作为NO2RR的电催化剂.
- 了解催化机制,并优化氨合成的性能.
主要方法:
- 在Mo2C (Cu1/Mo2C) 电催化剂上结的单原子Cu的合成.
- 电化学表征包括循环电压测量和时电压测量.
- 理论计算 (例如,DFT) 来阐明反应机制.
主要成果:
- 1/Mo2C在 -0.6 V 和 RHE.相比,表现出高的NH3-法拉第效率 (91.5%) 和产率 (472.9 μmol h-1 cm-2) .
- 理论研究揭示了Cu-Mo双活性位点的形成,增强了NO2-激活,降低了反应障碍.
- 催化剂有效地抑制了竞争的进化反应.
结论:
- 单原子Cu/Mo2C是一种高效的电催化剂,用于将化物减少为氨.
- -双活性中心的协同效应是催化剂卓越性能的关键.
- 这项工作为高效和选择性的电化学氨合成提供了一个有希望的策略.
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