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Self-driven recycling of sulfur-containing wastewater and hydrogen production is a novel concept that integrates environmental protection and new energy development. In this study, we designed for the first time a Zn-air battery self-driven coupling system for the hydrogen evolution reaction (HER), sulfur oxidation reaction (SOR) and developed a trifunctional catalyst suitable for this system capable of HER, SOR, and oxygen reduction reaction (ORR). By synthesizing cobalt sulfide (Co 3 S 4) in situ on nickel foam (NF), we obtained Co 3 S 4 /NF monolithic catalyst. It only requires 0.312 V and 0.244 V in SOR and HER, respectively, at 100 mA cm−2. Based on this achievement, the SOR||HER coupled electrolysis system was assembled, which achieved 0.69 V at 100 mA cm−2. Furthermore, the Zn-air battery (using Co 3 S 4 as ORR catalyst) could spontaneously drive the SOR||HER system to achieve high-rate hydrogen production. These findings provide promising opportunities for zero-energy consumption H 2 production and recycling of sulfur-containing wastewater. [Display omitted] • The self-driven SOR||HER hybrid electrolysis system was successfully designed. • Co 3 S 4 electrocatalysts were grown on Ni foam as three-dimensional catalyst for HER, SOR and ORR. • The electrolysis can be realized without energy consumption. • The sulfur-containing waste water can be recycled and H 2 generation occurs spontaneously. [ABSTRACT FROM AUTHOR]