Cyclodextrin‐supported Co(OH)2 Clusters as Electrocatalysts for Efficient and Selective H2O2 Synthesis

Abstract

AbstractCo‐based material catalysts have shown attractive application prospects in the 2 e− oxygen reduction reaction (ORR). However, for the industrial synthesis of H2O2, there is still lack of Co‐based catalysts with high production yield rate. Here, novel cyclodextrin‐supported Co(OH)2 cluster catalysts were prepared via a mild and facile method. The catalyst exhibited remarkable H2O2 selectivity (94.2 % ~ 98.2 %), good stability (99 % activity retention after 35 h), and ultra‐high H2O2 production yield rate (5.58 mol gcatalyst−1 h−1 in the H‐type electrolytic cell), demonstrating its promising industrial application potential. Density functional theory (DFT) reveals that the cyclodextrin‐mediated Co(OH)2 electronic structure optimizes the adsorption of OOH* intermediates and significantly enhances the activation energy barrier for dissociation, leading to the high reactivity and selectivity for the 2 e− ORR. This work offers a valuable and practical strategy to design Co‐based electrocatalysts for H2O2 production.