2024年2月29日 · In this study, we sought to enhance the catalytic activities of COFs in the ORR by modulating their intrinsic catalytic properties and improving their electronic conductivities.

【 要点1】 通过后氧化法成功合成了具有稳定中性碳自由基中心的共价有机框架（cof）材料（cof-r）。 这种材料在保持结晶性的同时，实现了碳自由基的稳定存在；【 要点2】 RCOF在四电子氧还原反应中表现出优异的催化…

2025年2月25日 · Inspired by N-confused porphyrins, we designed 20 metalloporphyrin-based COFs with either M–N 3 C 1 or M–N 4 centers, where M refers to 3d transition metals from Sc to Zn, for the electrocatalysis of oxygen reduction reaction (ORR). Density functional theory calculations predicted Co-based COFs to be the best ORR catalysts among the ...

Herein, we summarize the recent significant progress on the use of COF-based materials as an advanced bifunctional electrocatalyst for both ORR and OER, including COF-derived metal-free carbons, COF-derived metal–carbon hybrids, and COF-supported SACs.

3 天之前 · Experimental results display that the highest H2O2 selectivity (~90%) is offered by the benzothiophene-based COF bearing one benzene ring in the linker, exhibiting a negative correlation with the number of benzene rings in the linker. ... The decrease in benzene ring count enable the dominant pathway for 2e- ORR become the H2O2 formation ...

1 天前 · The accumulated electrons in CB react with O 2 to form •O 2 – radicals, which then produce H 2 O 2 via the ORR pathway, whereas Cu in CuTP-COF triggers the Fenton reaction leading to the formation of •OH, which plays an important role in the degradation of RhB adsorbed on CuTP-COF. This explanation verifies the results of the ...

2024年11月21日 · 在本研究中，研究了两种代表性共价有机框架 （cof） cof-366 和 pc-pbba cof 在氧还原反应 （orr） 中的催化潜力。 过渡金属原子（Fe 或 Co）掺入卟啉或酞菁环的中心，形成 Fe（Co）–N-C 单原子催化剂，可以催化过电位在 0.49 V 和 0.69 V 之间的 ORR。

本文（ChemCatChem 2024, e202400089）综述了共价有机框架（COFs）作为一类新兴的晶体聚合物在氧还原反应（ORR）设计中的应用策略。 COFs通过可逆聚合的方式由有机块构建而成。 文章重点讨论了COFs在结构设计上的新颖性以及针对应用的改性策略，特别是活性位点的操控，其规模从单个原子的电子状态到整个框架的结构排列。 综述旨在启发研究人员在ORR催化剂的设计和优化方面获得新的见解。 (1) COFs的发现与发展：自2005年Yaghi教授团队首次发现COFs …

2025年3月27日 · Meanwhile, we demonstrate that the iodine atom-induced weak electron polarization of the acceptor unit endows the I-COF photocatalyst with the adaptable electron potential energy level for maximum 2e – ORR thermodynamic driving force, accompanied by inhibition of the HER process and H 2 O 2 decomposition. In addition, the local electron ...

Chiral metal–organic framework (MOF) and covalent organic framework (COF) for the OER. Chiral metal–organic frameworks (MOFs) have also been explored for use as OER catalysts for CISS-controlled spin-polarized charge transfer. ... that displayed remarkable electrocatalytic activity for both the ORR and OER and surpassed the activity of Pt/C ...