通过在协同的CuCo双金属氧化物催化剂上通过中间吸附调节促进电催化 NO 减少
Shuyi Shen1, Linghui Yan1, Shuang Liu1
1Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China.
ACS applied materials & interfaces
|August 15, 2025
概括
这项研究引入了用于电催化氧化还原反应 (NORR) 的新型铜催化剂 (CuCo3Ox-650),显著提高了氨合成的选择性和效率. 催化剂还在Zn-NO电池中展示了用于能源转换和环境修复的双重功能.
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:
- 催化剂是电催化氧化还原反应 (NORR) 合成氨的关键,但其吸附能力较差.
- 改善NO吸附和中间结合对于高效的氨生产至关重要.
研究的目的:
- 为NORR.开发一种具有增强吸附性能的新型双金属催化剂.
- 研究铜和在催化剂中的协同作用,以提高氨的选择性和效率.
主要方法:
- 水热合成,然后进行受控化,以产生CuCo双金属催化剂 (CuCo3Ox-650).
- 对氨产生率和法拉第效率的电化学性能测试.
- 密度功能理论 (DFT) 分析以了解催化机制和电子结构.
- 使用催化剂对Zn-NO电池进行双重功能评估的操作.
主要成果:
- CuCo3Ox-650在0.5V下实现了高NH3生成速率 (312.1μmol h-1 cm-2) 和法拉第效率 (90.8%).
- DFT透露,Cu的结合通过向上移动d频段中心来增强NO和中间结合.
- 催化剂有效地抑制了演化反应 (HER),因为*H积累最小化.
- 在Zn-NO电池中的CuCo3Ox-650阴极产生了5.57 mW cm-2的峰值功率密度和438.44 μg h-1 cm-2.2的氨产量.
结论:
- 协同的CuCo双金属催化剂显著增强了氨合成的NORR.
- 催化剂显示了同时进行能源转换和环境修复应用的潜力.
- 优化的电子结构和吸附特性是催化剂卓越性能的关键.
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