Engineering an S-scheme ZnIn2S4/CuInS2 heterojunction on flexible substrate for steering selectivity in photothermal CO2 reduction towards CO

• S-scheme ZnIn 2 S 4 /CuIn 2 S 4 heterojunctions were grown on flexible SSFF substrates. • Near-infrared photothermal conversion raised the catalyst surface temperature to 159 °C. • Interfacial charge transfer dramatically enhanced CO 2 reduction kinetics and charge separation. • The heterostructure steered selectivity toward CO by suppressing deep hydrogenation pathways. • A CO production rate of 1627.7 μmol m -2 h -1 and 97.6% selectivity were achieved