Metal-Free Covalent Organic Frameworks for Electrocatalytic Oxygen Reduction Reaction,Macromolecular Rapid Communications

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Metal-Free Covalent Organic Frameworks for Electrocatalytic Oxygen Reduction Reaction
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2022-10-20 , DOI: 10.1002/marc.202200717
Ji Jia ₁ , Jiali Li ₁ , Si Ma ₁ , Zhenwei Zhang ₁ , Xiaoming Liu ₁

Affiliation

Exploring efficient and low-cost electrocatalysts for the oxygen reduction reaction (ORR) is important for renewable energy conversion. Covalent organic frameworks (COFs) have recently risen as ideal candidates for catalyzing ORR, but this field is still in its infancy. Herein, a new framework material (named as COF-JLU82) containing bifluorenylidene and benzoselenadiazole units with periodic alternating arrangement is designed and synthesized. The metal-free COF-JLU82 exhibits good electrocatalytic activity with a half-wave potential of 0.68 V, Tafel slope of 72.79 mV dec⁻¹ and the conversion frequency (TOF) of 0.0044 s⁻¹, which is better than the previously reported COF-JLU23. This study enriches the types of COF-based ORR electrocatalysts and promotes the development of more highly efficient metal-free ORR electrocatalysts.

中文翻译：

用于电催化氧还原反应的无金属共价有机骨架

探索用于氧还原反应 (ORR) 的高效低成本电催化剂对于可再生能源转化非常重要。共价有机框架 (COF) 最近成为催化 ORR 的理想候选材料，但该领域仍处于起步阶段。在此，设计并合成了一种新的骨架材料（命名为 COF-JLU82），其含有亚联芴基和苯并硒二唑单元，周期性交替排列。无金属COF-JLU82表现出良好的电催化活性，半波电位为0.68 V，Tafel斜率为72.79 mV dec ^-1，转换频率（TOF）为0.0044 s ^-1，优于之前报道的 COF-JLU23。该研究丰富了基于COF的ORR电催化剂的类型，促进了更高效的无金属ORR电催化剂的开发。

更新日期：2022-10-20

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