Photocatalytic hydrogen evolution (HER) has garnered significant attention in recent years as a promising method for sustainable hydrogen production. Among the various strategies employed, single-atom photocatalysis stands out as an innovative approach . In single-atom photocatalysis, metal atoms are isolated and anchored on a support material, allowing for the maximum exposure of active sites . This unique configuration facilitates highly efficient light absorption and electron transfer, making single-atom photocatalysts (SACs) particularly valuable in the HER process. Their ability to function effectively under ambient conditions, coupled with the possibility of tuning their electronic properties through careful material design, has positioned SACs as a critical component in advancing hydrogen production technologies . Their importance lies in the potential for high catalytic efficiency with low loading of precious metals, thus reducing the overall cost of photocatalytic systems.