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基于非贵金属的单原子催化剂的激光合成,用于氧降解反应

Yang Sha¹, Francis Moissinac¹, Menghui Zhu²

¹Department of Materials, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.

ACS applied materials & interfaces

|October 27, 2023

概括

本研究介绍了一种激光诱导的热激活方法,用于制造铁--碳 (Fe-N-C) 单原子催化剂 (SAC). 这种快速的技术增强了的保留,提高了活性点的密度,提高了氧降解反应 (ORR) 的性能,超过了催化剂.

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:

非贵金属单原子催化剂 (SAC) 为组金属提供了替代品.
具有Fe-N4活性位点的铁--碳 (Fe-N-C) 催化剂对氧降解反应 (ORR) 是有希望的.
从MOF中合成Fe-N-C催化剂的常规炉合成在高温下遭受气损失,从而降低了活性位点密度.

研究的目的:

开发一种快速的,固态的方法来制造高负荷的Fe-N-C SAC.
为了克服传统高温合成中的损失问题.
评估激光制造的Fe-N-C催化剂的ORR性能及其在空气电池 (ZAB) 中的应用.

主要方法:

激光诱导的热激活 (LITA) 铁前体吸收,碳化化化伊米达酸框架-8 (ZIF-8).
固态合成路线. 固态合成路线.
在性介质中对ORR进行电化学测试.
作为ZAB中的阴极催化剂的应用.

主要成果:

与炉子处理 (1.2 wt%) 相比,LITA有效地防止了气损失,实现了较高的Fe单原子负荷 (2.3 wt%).
合成的Fe-N-C催化剂在性介质中表现出优越的ORR半波潜力 (0.91V),而不是商业Pt/C (0.87V).
催化剂在ZAB中表现出极好的电化学性能.
通过LITA技术成功地合成了Co-N-C和Ni-N-C SACs.

结论:

激光诱导的热激活是一种有效和快速的方法,用于生产高质量的Fe-N-C SACs,使用增强的兴奋剂.
开发的Fe-N-C催化剂在ORR活动中超过商业Pt/C,并且对ZAB应用有前途.
该LITA方法是多功能合成各种非贵金属SACs.

关键词:

激光合成是一种激光合成.金属-有机的框架.非贵金属非贵金属的价值氧减少反应反应的氧减少反应.一个原子的催化剂.泽奥利特性意达酸框架-8-8

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