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 O₂ 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 O₂ generation reached 99.67% in 2 h with little metal leaching, and ·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.

中文翻译：

---

Co?N 石墨烯包封钴催化剂用于酸性条件下的 H2O2 分解

过氧化氢 (H ₂ O ₂ ) 已被列为世界上最重要的 100 种化学品之一。然而，大量残留的H ₂ O ₂在酸性条件下难以及时分解为O ₂和H ₂ O，容易产生爆炸危险。在这里，我们报道了一种核壳结构催化剂，即具有CoN结构封装的 Co 纳米粒子的石墨烯。CoN石墨烯壳层作为H ₂ O ₂分解的活性位点，而Co核进一步增强了这种分解。从中受益，H ₂ O ₂在没有调节pH值的情况下，经过6个循环后分解率接近100%，与无催化剂相比提高了6个数量级。同时，O ₂的生成在2 h内达到99.67%，几乎没有金属浸出，而·OH被大大抑制到只有0.08%。这项工作可以清洁去除H ₂ O ₂，​​几乎没有深度氧化，保护H ₂ O ₂利用过程，实现更安全的世界。