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协同设计ZIF-67/Sn-doped NiFe-LDH用于增强氧气演化反应

Rana Ahmed¹, Abeer Enaiet Allah², Ahmed A Farghali¹

¹Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University Beni-Suef 62511 Egypt aabdelwahab@psas.bsu.edu.eg.

Nanoscale advances

|August 1, 2025

概括

这项研究引入了一种新型的Sn-doped NiFe层状双氧化物 (LDH),与ZIF-67衍生的Co物种相结合,作为一种高效的氧化演化反应 (OER) 催化剂. 这种先进的材料显著提高了可持续能源应用的水分效率.

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:

有效且具有成本效益的氧化演化反应 (OER) 催化剂对于水分技术至关重要.
层状双氧化物 (LDH) 和金属有机框架 (MOF) 是有希望的,但需要进一步优化以提高催化活性和稳定性.

研究的目的:

为OER应用合成和表征一种与ZIF-67衍生的Co物种 (NiFe-LDH-Sn/ZIF-67) 集成的新型Sn合的NiFe-LDH.
研究Sn兴奋剂和ZIF-67结合对催化性能和稳定性的协同效应.

主要方法:

合成Sn-doped NiFe-LDH,并与ZIF-67衍生的Co.物种进行集成.
电化学表征包括超电位,Tafel斜率和电化学阻抗光谱 (EIS).
合成催化剂的长期稳定性测试.

主要成果:

NiFe-LDH-Sn/ZIF-67催化剂在10 mA cm−2时表现出1.59 V的低超电位与RHE相比,以及79 mV dec−1.1的Tafel斜率.
兴奋剂降低了相当串联电阻 (ESR) 从325 Ω降至161 Ω,增强了电子传输.
在24小时后,ZIF-67的合并使表面积增加到727 m2 g-1 ,并使催化稳定性提高了91.8%.

结论:

将LDH和MOF组件与Sn兴奋剂结合起来,可以产生高效和稳定的OER催化剂.
这种协同方法为开发用于可持续能源技术的先进电催化剂提供了有希望的途径.
开发的催化剂显示了在水分和生产中的实际应用的巨大潜力.

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