Photocatalytic Hydrogen Generation from a Visible-Light-Responsive Metal–Organic Framework System: Stability versus Activity of Molybdenum Sulfide Cocatalysts

• DOI: 10.1021/acsami.8b10010
• Publication Date: 2018-08-20T15:19:59Z
• Authors: Tu N. Nguyen; Stavroula Kampouri; Bardiya Valizadeh; Wen Luo; Daniele Ongari; Ophélie Marie Planes; Andreas Züttel; Berend Smit; Kyriakos C. Styli...
• Keywords: Visible spectrum; Noble metal; Photocatalytic water splitting

We report the use of two earth abundant molybdenum sulfide-based cocatalysts, Mo3S132- clusters and 1T-MoS2 nanoparticles (NPs), in combination with visible-light active metal-organic framework (MOF) MIL-125-NH2 for photocatalytic generation hydrogen (H2) from water splitting. Upon irradiation (λ ≥ 420 nm), best-performing mixtures Mo3S132-/MIL-125-NH2 1T-MoS2/MIL-125-NH2 exhibit high catalytic activity, producing H2 evolution rates 2094 1454 μmol h-1 gMOF-1 apparent quantum yields 11.0 5.8% at 450 nm, respectively, which are among highest values reported to date visible-light-driven photocatalysis MOFs. The performance can be attributed good contact between these MOF large number catalytically sites, while activity NPs is due their electrical conductivity leading fast electron transfer processes. Recycling experiments revealed that although slowly loses its retains least 72 h. This work indicates earth-abundant compounds stable highly splitting, should considered as promising cocatalysts new MOFs besides traditional noble metal NPs.