支持石墨烯的单原子催化剂为多功能电催化剂,由轴 Fe 四聚合物协调启用
Lulu Gao1, Donghai Wu2, Silu Li1
1Key Laboratory for Special Functional Materials of Ministry of Education, and School of Materials Science and Engineering, Henan University, Kaifeng 475004, China.
Journal of colloid and interface science
|July 19, 2024
概括
研究人员使用过渡金属集群的轴协调设计了多功能单原子催化剂 (SAC). 伊尔N4/Fe4显示出有希望的三功能活性,用于减少氧,氧进化和进化反应.
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:
- 多功能电催化剂对于储能和转换装置至关重要.
- 单原子催化剂 (SAC) 提供高效率,但实现多功能仍然是一个挑战.
- 过渡金属集群的轴协调可以调节SAC的催化行为.
研究的目的:
- 理论上探索多功能SAC的可行性,用于氧减少反应 (ORR),氧演化反应 (OER) 和演化反应 (HER),使用轴协调工程.
- 通过第一原则计算来确定三功能应用的有前途的SAC.
- 了解增强催化活性背后的机制.
主要方法:
- 使用第一原则计算来研究用石墨烯支持的MN4 SACs.
- 选了23个具有过渡金属集群 (Fe4,Co4) 轴协调的候选SAC.
- 进行电子结构分析以阐明催化机制.
主要成果:
- 用Fe4 (IrN4/Fe4) 装饰的IrN4被确定为OER,ORR和HER具有较低超潜力的有前途的三功能催化剂.
- RhN4/Fe4和CoN4/Fe4显示出作为双功能OER和ORR催化剂的潜力.
- 与原始NiN4 SAC相比,NiN4/Fe4表现出明显增强的ORR活性,这归因于与Fe4.4的电子相互作用.
结论:
- 过渡金属集群的轴协调工程是设计多功能SAC的可行策略.
- 在三功能电催化中,IrN4/Fe4 是一个有前途的候选物.
- 该研究提供了通过电子相互作用调节SAC性能的见解,指导未来的催化剂设计.
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