 Proton exchange membrane fuel cells, PEMFCs, and uranium-based nuclear techniques are two promising green and advanced energy sources. However, both have faced significant technical challenges. PEMFCs have been plagued with poor proton conductivity, high activation energy, and other issues, while uranium-based nuclear techniques have struggled with the lack of an effective method to selectively extract UO2 plus from concentrated nitric acid. Researchers have recently developed sulfonic pendant-vinylene-linked covalent organic frameworks, COFs, which contain abundant sulfonic groups for both intrinsic proton conduction and UO2 plus capture via strong coordination fixation and vinylene linkages. These COFs have demonstrated excellent performance in 12MHNO3, making them ideal candidates for use in both PEMFCs and uranium-based nuclear techniques. This article was authored by INSU, ZHIWU, QINYUNZHONG, and others.