摘要: Ternary sulfide solid solutions have garnered great attention in photocatalytic water splitting due to their tunable electronic property, low cost, and sufficient light-absorption performance. Herein, a series of MnxCd1-xS samples with different Mn/Cd molar ratios were synthesized by solvothermal method and used for photocatalytic hydrogen production under visible light. The Mn0.2Cd0.8S and Mn0.4Cd0.6S were demonstrated to be the solid solutions, while Mn0.6Cd0.4S and Mn0.8Cd0.2S consist of MnxCd1−xS solid solution and MnS. In addition, the Mn0.4Cd0.6S exhibited the highest photocatalytic performance with the H2 production rate of 185.95 μmol·h-1, which was 4.7 times higher than that of CdS. Without the cocatalyst, the quantum efficiency of Mn0.4Cd0.6S reached 2.04% at 400 nm. In addition, the Mn0.4Cd0.6S solid solution also showed high stability during the photocatalytic H2 production reaction. The effect of the Mn/Cd molar ratio on the microstructure, band gap structure, and photocatalytic hydrogen production performance of MnxCd1−xS was revealed systematically. The excellent photocatalytic H2 production performance of the Mn0.4Cd0.6S solid solution is mainly due to its enhanced reducing potential and high charge separation efficiency.