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评估施瓦茨P表面对多孔单原子催化剂氧气电还原性能的影响

Zhi Xu¹, Tianyu Xiao¹, Yinghua Li¹

¹School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Shanghai Jiao Tong University, Shanghai, 200240, China.

Advanced materials (Deerfield Beach, Fla.)

|November 21, 2024

概括

研究人员开发了一种具有独特负高斯曲率表面的新型双连续半孔铁单原子催化剂 (bmFeSAC). 这种催化剂显示出对Zn-空气电池的增强氧降解反应活性和潜力.

科学领域:

材料科学材料科学材料科学
催化剂是一种催化剂.
纳米技术纳米技术

背景情况:

表面曲率显著影响催化剂性能.
负高斯曲率表面在多孔催化剂中的作用由于合成挑战而未被探索.
双连续结构,虽然是理想的模型,但很难准备.

研究的目的:

为了合成一个具有负高斯曲率表面的双连续中孔催化剂.
调查这种独特的表面结构对催化性能的影响,特别是对于氧降解反应.
为了证明合成催化剂在储能装置中的潜在应用.

主要方法:

使用金属有机框架作为前体和聚合物立方体作为模板.
合成了一种双连续的半孔铁单原子催化剂 (bmFeSAC),具有施瓦茨P表面.
描述了催化剂的表面积,活性位点分布和Fe含量.

主要成果:

实现了高特异面积 (916 m2 g-1) 和均的Fe-N4活性位点 (1.80重量%).
由于连续通道,证明了催化场的高利用效率.
观察到一个低反应能量屏障,归因于负高斯曲率表面.
实现了高半波潜力 (0.931V与RHE) 氧降解反应 (ORR).
基于BmFeSAC的Zn-空气电池表现出色.

结论:

双连续的多孔结构可以通过改善站点利用率和调节电子结构来增强催化活性.
负高斯曲率表面降低反应能量障碍,提高催化效率.
合成的bmFeSAC显示出作为ORR和Zn-空气电池中的电催化剂的巨大希望.

关键词:

双连续结构的结构.有负的高斯曲率.氧减少反应反应的氧减少反应.黑色 P 表面 P 黑色一个原子催化剂.

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