Synergistic Single-Atom and Clustered Cobalt Sites on N/S Co-Doped Defect Nano-Carbon for Efficient H2O2 Electrosynthesis

作者：Yuzhong Huang, Chang Zhang, Xingyu Wang, Youyin Wu, Jun Lv, Jian Zhang, Wangqiang Shen, Xing Lu · 发表于：Nano-Micro Letters · 年份：2025 · DOI：10.1007/s40820-025-01657-9 · 被引用次数：46 · 研究领域：Electrocatalysts for Energy Conversion、Advanced battery technologies research、Electrochemical Analysis and Applications

Abstract Non-noble-based single atomic catalysts have exhibited significant potential in electrochemical production of H2O2 via two-electron oxygen reduction reactions (2e− ORR). However, constructing highly efficient and acid-resistant catalysts remains a challenge but significant. In this work, fullerene (C60) with abundant pentagonal inherent defects was employed as a carbon substrate to synthesize defect-rich nanocarbon electrocatalysts doped with NSCo single atoms and accompanied by metallic Co nanoparticles (CoSA/CoNP-NSDNC) for the first time. The electrochemical experiments demonstrate that the active sites of CoSA/CoNP-NSDNC are formed through the synergistic interaction between NSCo single atoms and Co nanoparticle clusters embedded within the carbon framework. The obtained CoSA/CoNP-NSDNC catalyst exhibits an onset potential as 0.72 V versus RHE and achieves up to 90% H2O2 selectivity over a wide potential range of 500 mV. Moreover, the as-obtained CoSA/CoNP-NSDNC configured as the cathode in a self-assembled flow cell under acidic conditions achieves a high H2O2 production rate of 4206.96 mmol gcat⁻1 h⁻1 with a Faraday efficiency of ∼ 95% and exhibit ultra fast degradation of organic pollutants. This work focuses on the synergistic effect of non-noble metal nanoparticles, metal single-atom sites, and topological defects on the 2e− ORR process, which provides a new direction for designing carbon-based catalysts for efficient H2O2 electrosynthesis.