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有效的Fe-N-C氧降解电催化剂通过N-丰富的分子导向热解

Qingxue Lai¹, Hongmei Zheng¹, Wanying Zhang¹

¹Jiangsu key Laboratory of Electrochemical Energy Storage Technologies, College of Materials Science and Technologies, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China. laiqingxue@126.com.

|September 29, 2023

概括

这项研究引入了一种新的Fe-N-C电催化剂,用于使用双导热解法进行酸性氧减少反应 (ORR). 催化剂表现出卓越的性能和稳定性,接近基材料的性能.

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:

Fe-N-C催化剂是酸性氧减少反应 (ORR) 的非贵金属替代品.
在控制Fe活性位点的分散,利用和稳定性方面仍然存在挑战.
现有的催化剂往往难以与基材料的性能相匹配.

研究的目的:

开发一种高效的Fe-N-C电催化剂,用于酸性ORR.
为了克服Fe活性位点分散,利用和稳定性的局限性.
为了达到与商业催化剂相提并论的性能.

主要方法:

采用了富含N的分子双导 Pyrolysis 策略.
作为前体,使用了受的化化胺基-8框架-8 (Fe-ZIF-8).
南和胺分子指导了Fe的原子水平分散.

主要成果:

一个独特的黄皮纳米结构与受控的碳骨架被建造.
优化的Fe-N-C催化剂在酸性介质中实现了0.78V的半波潜力,而不是RHE.
在耐用性测试后,催化剂的降解最小 (19mV负转移).

结论:

双导火解策略有效地产生原子分散的Fe-N_x活性位点.
蛋黄外结构增强了酸性ORR的电催化活性和耐久性.
这种方法为开发高性能,非贵金属ORR电催化剂提供了可行的途径.

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