 Water electrolysis is an emerging energy conversion technology, which is significant for efficient hydrogen, H2, production. This study reports that the co-based coordination polymer, ZF6-7, anchoring on an indium organic framework, in OF1, composite is treated followed by carbonization and phosphorization to successfully obtain copper nanoparticles-embedded carbon nanotubes. This article was authored by Lulu Chai, Shui Hu, Xian Wang, and others.