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通过调整 Co/Mn 内容以普鲁士蓝色类似的内容来实现高的 OER 性能

Chang Wu¹, JinSong Wang², Jiayang Li³

¹Chemical and Process Engineering Department, University of Canterbury, Christchurch 8401, New Zealand.

ACS applied materials & interfaces

|October 17, 2024

概括

开发高效的氧进化反应 (OER) 催化剂是绿色生产的关键. 本研究介绍了一种廉价的FeCoMn普鲁士蓝模拟 (PBA) 催化剂,该催化剂在分水应用中表现出色的性能和稳定性.

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
催化剂是一种催化剂.

背景情况:

越来越多的清洁能源需求推动了人们对绿色的水分的兴趣.
氧进化反应 (OER) 是由于动力学缓慢而导致水分裂的瓶.
有效且具有成本效益的开放式能源催化剂对于实际应用至关重要.

研究的目的:

合成一种廉价且可调节的FeCoMn普鲁士蓝模拟物 (PBA) 作为一种高效的OER催化剂.
为了优化Co和Mn比率,提高电化学性能.
用先进的表征和计算方法研究催化机制.

主要方法:

简单的合成FeCoMn普鲁士蓝色类似物 (PBA).
电化学测试以评估OER性能,包括超电位和Tafel斜率.
用于电子结构分析的X射线吸收光谱 (XAS).
密度函数理论 (DFT) 计算以了解催化机制.

主要成果:

在FeCo$_{0.41}$Mn$_{0.42}$ PBA催化剂表现出优越的OER性能:在10/50 mA cm$^{-2}$时有260/304 mV的超电位.
实现了48mV dec^{-1}$的低Tafel斜率和在10mA cm^{-2}$时72小时的显著稳定性.
XAS和DFT显示了Co活性部位的优化电子密度和由于Mn和Fe的合而增加的导电性.

结论:

开发的FeCoMn PBA是一种具有成本效益和高效的催化剂,用于氧气演化反应.
用Mn和Fe进行优化注增强了导电性,并激活了关键的水去质子化步骤.
这种催化剂显示出通过水分技术推进绿色生产的巨大潜力.

关键词:

DFT计算方法的计算方法普鲁士蓝的类似物是普鲁士蓝的.在现场 XASAS XAS.氧气吸附吸附方式氧气进化反应反应氧气进化反应表面的重建表面的重建

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