Developing　efficient　strategies　for　converting　hazardous　hydrogen　sulfide　(H2S)　waste　into　valuable　products　is　crucial　for　mitigating　environmental　pollution　and　maximizing　resource　utilization.　Herein,　we　present　a　novel　approach　for　the　selective　reduction　of　nitroarenes　(PhNO2)　to　arylamines　(PhNH2)　utilizing　H2S　as　the　hydrogen　source.　This　process　is　facilitated　by　isolated　Fe-Nx　sites　embedded　within　graphitic　carbon　nitride　(Fe-CN-x)　obtained　through　a　polymerization　assembly　method.　The　Fe-CN-3　catalyst,　in　particular,　achieves　PhNO2　conversion　of　92.0　%　with　PhNH2　selectivity　of　95.8　%　at　110°C　within　2　h　reaction,　outperforming　the　Bulk-CN,　commercial　active　carbon,　and　commercial　Fe2O3.　Furthermore,　the　Fe-CN-3　catalyst　can　further　trigger　the　reduction　of　other　substituted　PhNO2　with　high　activities.　Importantly,　the　Fe-CN-3　catalyst　is　resistant　to　sulfur　poisoning,　exhibiting　high　durability,　with　no　obvious　decline　of　catalytic　activity　in　five　cycles.　Systematic　characterizations　and　density　functional　theory　calculation　(DFT)　disclose　that　the　isolated　Fe　atoms　prefer　to　occupy　four-coordinate　doping　configurations　(Fe-N4)　and　the　key　to　this　mechanism　is　the　hydrogen　transfer　process　from　PhNHOH*　+　HS*　→　PhNH*　+　S　+　H2O.　©　2025　Elsevier　B.V.