Hydrogen　sulfide　(H2S),　a　secondary　energy　carrier　with　remarkable　energy　density,　has　emerged　as　an　innovative　hydrogen　donor　for　the　hydrogenation　of　nitroarenes.　Nevertheless,　the　lack　of　efficient　catalysts　has　impeded　the　development　of　this　novel　resource　utilization　method.　Here,　we　proposed　a　facile　and　eco-friendly　approach　for　the　synthesis　of　isolated　Cu　sites　on　MXene　catalysts　by　a　combination　of　Lewis　acid　salt　melt　etching　and　oxidative　dispersion.　The　as-designed　MXene　catalysts　demonstrate　high　activity　and　product　selectivity　towards　different　nitroarenes　at　70　°C　within　a　2　h　reaction.　The　in-situ　characterizations　and　DFT　calculations　reveal　that　the　active　Cu　sites　significantly　lower　the　energy　barriers　for　the　nitro　dissociation　and　hydrogenation　of　intermediates,　facilitating　amino　formation.　The　mechanism　involves　an　acceleration　of　the　hydrogen　transfer　process　over　C6H5NO2*,　leading　to　hydroxylation　of　the　nitro　group　followed　by　deprotonation,　ultimately　resulting　in　the　formation　of　an　amino　group.　©　2025