The Zr₈O₆ Secondary Building Unit and Porphyrin Linker Catalyze Light-Driven H₂ Evolution in Porphyrin-Based Metal Organic Frameworks.

ABSTRACT: The four Zr₈O₆-based metal-organic frameworks (MOFs), porous coordination network (PCN) 221 M, comprising earth-abundant metalloporphyrin tetracarboxylate (M-TCPP, M: 2 H, Zn, Ni, and a mixture of 1:1 Zn and Ni), are investigated for light-driven H₂ evolution reaction (HER) in water. Under the irradiation of a 405 nm light emitting diode source and in the presence of triethanolamine (TEOA) as a sacrificial electron donor, the photocatalytic HER activity of PCN 221 varies with the metal center in the porphyrin linker. Among the tested MOFs, the Zn-porphyrin derivative (PCN 221 Zn) produces H₂ at a TON = 4, which is about seven times greater than that of homogeneous Zn-TCPP (0.6) and superior to its 2 H (2.7), Ni (0.40), and ZnNi (1.6) analogs. Det

SUBMITTER: Mandal S 

PROVIDER: S-EPMC12270369 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature