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硫注射对ORR/OER性能在双活性位点Co-MOF/MXene电催化剂中的负面影响

Mohamedazeem M Mohideen¹, P Chinnappan Santhosh², Adiyodi Veettil Radhamani²

¹Beijing Key Laboratory of Advanced Functional Polymer Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.

Journal of colloid and interface science

|October 12, 2025

概括

这项研究揭示了硫注射阻碍了CO-MOF/MXene电催化剂在氧气减少和演化反应中的性能. 无硫催化剂在清洁能源应用中表现出卓越的双功能活性.

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:

对于燃料电池和金属空气电池来说,高效的氧降解 (ORR) 和氧演化 (OER) 电催化剂至关重要.
非贵金属催化剂显示出希望,但活性位点机制仍然不清楚.
异原子兴奋剂通常被认为是普遍提高催化剂性能.

研究的目的:

设计一个Co-MOF/MXene混合电催化剂,以优化双金属活性位点,以实现高双功能ORR/OER活性.
调查硫对催化剂结构和性能的影响.
挑战对电催化剂中异构原子兴奋剂的普遍益处的假设.

主要方法:

制造一个Co-MOF/MXene混合电催化剂.
硫添加剂和无硫催化剂的比较分析.
使用先进技术进行结构性表征.
对ORR和OER活动进行电化学测试,包括开始/半波电位和双功能间隙.

主要成果:

发现硫注射会破坏活性位点的协同作用平衡,降低催化性能.
结构分析证实了框架内的硫替代,改变了协调.
无硫Co-MOF/MX-1催化剂实现了优异的ORR/OER性能,具有较低的双功能间隙 (0.78V).
观察到高ORR开始/半波潜力 (0.90/0.81V与RHE) 和低H2O2产量 (2.95%).

结论:

硫注射通过改变活性部位的化学成分,对Co-MOF/MXene电催化剂的性能产生负面影响.
无硫催化剂由于协同作用的Co-N3-Ti3C和TiN活性位点而表现出卓越的双功能活性.
这项工作为非珍贵的双功能电催化剂提供了新的设计原则,挑战了传统的兴奋剂策略.

关键词:

活跃的网站活跃的网站燃料电池燃料电池的使用情况.金属电池的使用方法金属有机框架结构氧减少/进化反应反应它具有双功能催化活性.

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