S-Pt coordination bond enhanced local surface plasmon resonance boosts photocatalytic H2 production coupled with high value-added products from plastic waste

Solar driven the conversion of plastic waste, one of emerging environmental pollution sources, into clear energy and high value-added products, is of great significance for human health and sustainable economic development globally, however, still suffer from low reaction kinetics and unsatisfactory selectivity. Herein, we proposed a new strategy of zinc indium sulfide (ZIS) nanosheets anchoring Pt cluster (ZIS-Pt-Clu) for enhancing local surface plasmon resonance (LSPR), by accurately synthesizing S-Pt coordination bond for constructing electron transport channel, for the purpose of promoting the reaction kinetics and selectivity of plastic waste into hydrogen and high value-added products. Experiment shows that the as-made ZIS-Pt-Clu photocatalyst exhibits a high hydrogen production rate of 11.7 mmol h⁻¹g⁻¹, together with 97.5 % of selectivity of polylactic acid (PLA) to pyruvic acid (PA), which is the best compare with ZIS/Pt-Clu without hot electron transport channel and reported active materials. In addition, the S-Pt coordination bond also triggers strong interface crystal field between Pt cluster and ZIS to promote the separation and transport of photogenerated carriers, which accelerates the photocatalytic conversion of PLA into H₂ and PA. Overall, this work reportes a new strategy of LSPR enhanced photocatalytic performance, opening the door for the fundamental research of designing high performance photocatalyst for the degradation of plastic waste to the production of new energy and high value-added products.