▎ 摘　　要

Hydrogen peroxide (H2O2) has been listed as one of the 100 most important chemicals in the world. However, huge amount of residual H2O2 is hard to timely decomposed into O-2 and H2O under acidic condition, easily resulting in explosion hazard. Here, we reported a core-shell structure catalyst, that is graphene with Co-N structure encapsulated Co nanoparticles. Co-N graphene shell serves as the active site for the H2O2 decomposition, and Co core further enhance this decomposition. Benefiting from it, the H2O2 decomposition were close to 100% after 6 cycles without pH adjustment, which increased 6 orders of magnitude compared with no catalyst. At the same time, the O-2 generation reached 99.67% in 2 h with little metal leaching, and center dot OH has been greatly inhibited to only 0.08%. This work can cleanly remove H2O2 with little deep oxidation and protect the process of H2O2 utilization to achieve a safer world.