Fig. 4: Mechanism insight the photocatalytic H2 evolution.
From: Protruding Pt single-sites on hexagonal ZnIn2S4 to accelerate photocatalytic hydrogen evolution
a UV–vis diffuse reflectance spectra for h-ZIS, Pt0.3-ZIS, and Pt3.0-ZIS, insert: digital images for h-ZIS, Pt0.3-ZIS, and Pt3.0-ZIS, the concentration of suspensions is 2 mg mL−1. b Bandgap for h-ZIS and Pt0.3-ZIS. c Comparison and relationship of VBM, Ef, and Evac of UPS spectra. d UPS spectra of h-ZIS and Pt0.3-ZIS in the valence band region. e Schematic illustration of the band structure of h-ZIS and Pt0.3-ZIS. f Normalized time profiles of transient absorption at 1150 nm during the TDR of h-ZIS, Pt0.3-ZIS, and Pt3.0-ZIS.
