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合并Fe单原子合的MoC纳米粒子在N-Doped等级多孔碳立方体中,用于氧气电还原

Qin Li¹, Jing Zhao¹, Peng Li²

¹Key Laboratory of Advanced Civil Engineering Materials of the Ministry of Education, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China.

|August 8, 2024

概括

一种新的铁素辅助策略可以在多孔碳中 (MoC@FeNC-50) 创建单个Fe原子与MoC纳米粒子相结合. 这种电催化剂显著提高了氧降解反应动力学和能源应用的耐用性.

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
纳米技术纳米技术

背景情况:

氧降解反应 (ORR) 动力学对电催化剂至关重要,这取决于电子结构和质量扩散.
合理调节这些特性是开发高效ORR电催化剂的关键.

研究的目的:

开发一种铁素辅助的策略,用于制备Fe单个原子和MoC纳米粒子共嵌入层级多孔N-化碳立方体 (MoC@FeNC-50).
研究铁素在调节电子结构和形态学中的作用,以提高ORR性能.

主要方法:

铁素辅助合成Fc@ZnMo-HZIF-50和随后的导出到MoC@FeNC-50.
材料的结构,组成和多孔性的表征.
对ORR活性和耐久性的电化学评估.

主要成果:

MoC@FeNC-50催化剂呈现出层次性的多孔结构,Fe单个原子与MoC纳米颗粒相结合.
铁和MoC之间的电子再分配增强了O2吸附和*OOH中间体的形成.
实现了出色的ORR活动 (E1/2 = 0.83 V) 和耐用性 (在40,000秒后衰减9.5%).

结论:

铁素辅助策略通过工程电子配置和动力学有效地创建高效的电催化剂.
在需要高性能ORR电催化剂的应用中,MoC@FeNC-50具有显著的潜力.
这种方法为通过控制合成和电子调制设计先进催化剂提供了洞察力.

关键词:

铁单原子是一个单原子.这就是MoC MoC.层次性的多孔结构结构.金属-有机的框架.氧气电还原是指氧气的电还原.

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