Iron-based　catalysts　are　promising　for　the　catalytic　oxidation　of　H2S　owing　to　their　non-toxicity,　abundance,　and　high　conversion　efficiency.　However,　their　industrial　applications　are　hampered　by　the　low　selectivity　and　poor　durability.　Herein,　we　reported　a　simple　one-step　pyrolysis　approach　to　synthesize　isolated　Fe–Nχ　sites　confined　in　graphitic　carbon　nitride　(Fe-CN-NHχ).　The　creation　of　isolated　Fe–Nχ　sites　was　evidenced　by　aberration-corrected　high-angle　annular　dark-field　scanning　transmission　electron　microscopy　(HAADF-STEM),　X-ray　absorption　spectroscopy　(XAS),　UV–vis-NIR　diffuse　reflectance　spectroscopy　(DRS),　and　X-ray　photoelectron　spectroscopy　(XPS).　The　well　dispersed　Fe–Nχ　sites　offer　additional　active　centers　for　the　reaction,　and　such　form　of　Fe　presence　effectively　resists　the　deep　oxidation　of　H2S.　As　a　result,　the　obtained　Fe-CN-NH5　catalyst　exhibited　outstanding　catalytic　performance　with　high　sulfur　selectivity.　Significantly,　the　Fe–Nχ　sites　are　resistance　to　sulfur　poisoning,　leading　to　excellent　durability　in　the　reaction.　No　obvious　decrease　of　catalytic　activity　was　observed　in　a　reaction　period　of　180　h,　which　is　better　than　those　of　reported　iron-based　catalysts.　©　2020　Elsevier　B.V.