Incorporating porphyrin-Pt in light-harvesting metal-organic frameworks for enhanced visible light-driven hydrogen production

Molecular catalysts for H 2 -evolution are of interest their integration into light-harvesting complexes photocatalytic water splitting. Here, we report the meso-tetra (4-carboxyphenyl) porphine [(TCPP)Pt II ] complex as a molecular -evolving photocatalyst using chloranilic acid (CA) sacrificial electron donor, choice which is critical to stability photocatalyst. When triethanolamine was used, decomposed form Pt nanoparticles. Density functional theory calculations together with evidence from electrochemical and spectroscopic analyses suggested that catalysis possibly initiated by proton-coupled transfer (PCET) I ]-N-H, followed another injection protonation -hydride]-N-H intermediate can release . As whole catalytic cycle involves multiple electrons, network should be helpful providing photo-induced electrons. Thus, integrated this catalyst metal-organic framework boost its activity ~830 times. This work presents mechanistic study evolution energy highlights importance injections. Integrating boosts The