Rhodium Single-Atom Decorated CeO₂:Yb,Er/Rh-ZnIn₂S₄ With Enhanced Photo-Thermo-Electric Effects for Efficient H₂...

Most widely-studied semiconductor catalysts have low efficiency in utilizing near-infrared (NIR) light in the solar spectrum, while also facing major issues such as slow charge-carrier migration rate and lack of active sites that limit photocatalytic performance. Here, a new strategy to promote the solar-light driven photocatalytic activity of ZnIn₂S₄ was proposed by introducing Rh single atom (SAs) into CeO₂:Yb,Er/ZnIn₂S₄ with photo-thermo-electric effects. The introduction of Rh SAs into ZnIn₂S₄ effectively suppresses charge recombination, and improves reaction rate through photo-thermal effect. CeO₂:Yb, Er converts NIR light into visible light via up-conversion photo-optical processes and generates high-energy electrons via two-photon photo-electronic process, both of which can activate ZnIn₂S₄. Large contact area and strong interface electric field between CeO₂ and ZnIn₂S₄ enhance photo-electric conversion efficiency. The CeO₂:Yb,Er/Rh-ZnIn₂S₄ exhibits a hydrogen production rate of up to 99.68 mmol·g^-1·h^-1 at 10°C and 148.06 mmol·g^-1·h^-1 with non-temperature-controlled conditions. Under mild conditions, the photocatalysts can convert glucose into high-value-added chemicals (e.g., arabinose) while simultaneously generating hydrogen. This work provides a new strategy to improve NIR light utilization efficiency and enhance charge-carrier separation capability through photo-thermo-electric effects, promoting the production of green hydrogen and biomass conversion into high-value-added chemicals.