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一个碳酸盐链接器策略通过密集可访问的Fe-N₄位点来增强Zn-空气电池中的氧气电还原

Dan Wang¹, Sujuan Zha¹, Yaqiang Li²

¹Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China.

Journal of colloid and interface science

|April 2, 2024

概括

一种新的碳酸盐链接器策略增强了来自ZIF-8的铁--碳单原子催化剂,用于减少氧的反应. 这提高了空气电池的性能,超过了以前的限制.

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:

铁--碳衍生单原子催化剂的酸-伊米达酸框架-8 (ZIF-8) 在空气电池 (ZAB) 中显示出氧降解反应 (ORR) 的前景.
与基催化剂相比,目前的ZIF-8衍生催化剂由于缺乏活性Fe-N位点而表现出有限的ORR活性.

研究的目的:

开发一种由ZIF-8衍生而来的FeNCOAc催化剂,具有增强的Fe-N4单原子位密度和改善的多孔性.
为了研究催化剂在空气电池的氧降解反应中的性能.

主要方法:

采用碳酸盐 (OAc) 连接器策略来合成ZIF-8衍生的FeNCOAc催化剂.
用密度函数理论 (DFT) 的计算来确认催化剂的特性.
在性介质中的性能评估和组装到液态和固态ZAB中.

主要成果:

FeNCOAc催化剂显著增加了Fe-N4单原子位密度和层次孔隙性.
在0.906V的半波潜力 (E1/2) 的性介质中实现了优异的ORR活性.
组装的液体ZAB表现出173.9 mW cm-2的峰值功率密度,高特异容量 (770.9 mAh g-1),以及出色的耐用性. 固态ZAB也表现出色.

结论:

碳酸盐链接器策略有效地增加了ZIF-8衍生催化剂中的Fe-N4位点密度和多孔性.
FeNCOAc催化剂在ZAB中为ORR提供了卓越的性能,使其成为基催化剂的竞争性替代品.
这种方法为储能应用中的先进催化剂铺平了道路.

关键词:

可访问的Fe-N(4) 站点.氧降解反应是氧降解反应.一个原子的催化剂.气电池是使用气电池的电池.

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