Tuning the Optoelectronic Properties of Hybrid Functionalized MIL-125-NH2 for Photocatalytic Hydrogen Evolution

• DOI: 10.1021/acsami.0c19345
• Publication Date: 2021-01-19T17:16:04Z
• Authors: Farrokh Mohammadn...; Stavroula Kampouri; Samuel K. Wolff; Yunkai Xu; Mostafa Feyzi; Jung-Hoon Lee; Xiulei Ji; Kyriakos C. Styli...
• Keywords: Lone pair; Visible spectrum

Metal–organic frameworks (MOFs) constructed with mixed ligands have shown great promise in the generation of materials improved sorption, optical, and electronic properties. With an experimental, spectroscopic, computational approach, herein, we investigated how incorporation different functionalized within structure MIL-125-NH2 affects its performance photocatalytic water reduction. We found that multiligand MOF has impact on light absorption spectrum structure. These combined modifications improve MIL-125-NH2, thereby increasing rate hydrogen evolution reaction. Of four nanoparticle/MOF systems tested, showed Pt/MIL-125-NH2/(OH)2 system (Pt nanoparticle plus amino dihydroxyl ligands) outperforms counterpart Pt/MIL-125-NH2 system, attributed to enhanced p−π conjugation between lone pairs O atoms their aromatic resulting a red-shifted greater spatial distribution electron density.