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Cu@Co与扩展应变用于高性能电催化降低低度氧化的低度氧化

Ze Wu¹, Yujing Liu¹, Dongdong Wang²

¹College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, Hunan, 410114, P. R. China.

Advanced materials (Deerfield Beach, Fla.)

|December 19, 2023

概括

这项研究引入了一个Cu@Co催化剂,用于电催化降低低度氧化 (NO) 到氨 (NH3). 新型催化剂实现了高氨产量和效率,为NO去除和合成提供了可持续的解决方案.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
催化剂是一种催化剂.

背景情况:

氧化 (NO) 到氨 (NH3) 的电催化降解为同时去除NO和合成NH3的可持续途径.
在催化过程中,高效地将低度的NO转化为NH3仍然是一个重大挑战.

研究的目的:

开发和研究一个Cu@Co催化剂,用于将低度NO电还原为NH3.
了解界面应变在增强催化性能中的作用.

主要方法:

合成和特征的Cu@Co催化剂.
电化学评估NO的减少到NH3.
球形偏差校正传输电子显微镜 (TEM) 和几何相位分析 (GPA).
密度函数理论 (DFT) 的计算和NO的温度编程溶解 (NO-TPD).

主要成果:

Cu@Co催化剂显示出高NH3产量 (627.20μg h−1 cm−2) 和法拉第效率 (76.54%) 的低度NO电还原.
证实了Cu-Co接口的扩张应变,由Co原子占据Cu网格位置引起的.
应变增强了NO吸附,并降低了决定速度的步骤 (*NO~*NOH) 的能量屏障.
使用Cu@Co阴极的Zn-NO电池实现了3.08 mW cm−2的功率密度,NH3产量为273.37 μg h−1 cm−2.

结论:

在Cu@Co催化剂中的工程扩张应变显著提高了NO降解为NH3的电催化性能.
这种催化剂为同时进行环境修复和有价值的化学合成提供了一个有希望的方法.
集成的Zn-NO电池展示了与氨生产一起产生能源的潜力.

关键词:

在Cu@Co催化剂中,合成NH3的方法没有减少,没有减少.扩张张应变扩张应变电催化剂是一种电催化剂.

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