Synthesis of MnxCd1−xS nanorods and modification with CuS for extraordinarily superior photocatalytic H2 production

Abstract

Nanorods, with high length-to-diameter ratio, enhanced optical absorption capacity and scattering properties, have aroused researchers' interests. Herein, novel and crystalline Mn_xCd_1−xS (0 ≤ x ≤ 1) nanorods were prepared via a facile solvothermal method. By employing an in situ ion exchange process, CuS/Mn_0.3Cd_0.7S composites were constructed. The prepared catalysts displayed particularly high H₂ evolution performance, with the maximum reaching 106.84 mmol g⁻¹ h⁻¹, and 18.32% (λ = 420 nm) apparent quantum efficiency (AQE). The characterization results confirmed that the Mn_0.3Cd_0.7S nanorods and the heterojunction at the contact interface of CuS and Mn_0.3Cd_0.7S were the origin of such fine H₂ production. Furthermore, deactivation of the studied catalysts were explored profoundly.