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类似的协调环境促进氧化演化反应的化MOF-74-Co预催化剂

Haoran Wang¹, Hui Liu¹, Yuanjie Cao¹

¹Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, Zhejiang, PR China.

Journal of colloid and interface science

|September 3, 2025

概括

在双金属金属有机框架 (MOF) 中的兴奋剂为氧化演化反应 (OER) 创造了有效的催化剂. 这种新的MOF-74-CoIn预催化剂表现出极好的性能和稳定性.

科学领域:

材料科学
电化学
催化剂

背景情况:

氧化演化反应 (OER) 对于水分裂至关重要,但其动力学较慢.
需要有效的非贵金属催化剂来克服这些局限性.
金属有机框架 (MOF) 为催化应用提供可调节的结构.

研究的目的:

合理设计一种添加的双金属MOF (MOF-74-CoIn) 作为OER的前催化剂.
研究对MOF-74-Co的结构和电子效应.
阐明被染的MOF的激活机制和性能,以有效地氧化水.

主要方法:

用对MOF-74-Co进行合成后的修改.
结构和光谱分析 (例如XRD,XPS).
电化学特性 (例如,OER性能,Tafel斜率,稳定性).
物理化学表征和理论计算 (DFT).

主要成果:

在不损害结构完整性的情况下,将纳入MOF-74-Co引发了CoO键收缩.
激活的MOF-74-CoIn-OER表现出优异的OER性能:在10 mA cm-2时,超电位为308 mV,Tafel斜率为58.1 mV,在120小时内稳定性为95.2%.
兴奋剂加速了电化学重建到活跃的兴奋剂 CoOOH 阶段,稳定了 Co3+ 位点并促进了阶段转换.
理论计算证实,通过改变CoOOH的电子结构,降低了OER的能量障碍.

结论:

作为基于MOF的OER催化剂中的关键电子调节器.
这项研究为MOF前催化剂的动态激活提供了原子层面的见解.
化MOF的合理设计为开发高效的水氧化催化剂提供了有前途的策略.

关键词:

协调环境在中毒的COOH 金属有机框架氧的演变预催化剂

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