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 g_cat⁻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.

An unexpected cyclopropanated C ₃ -ring coordinating with a Ti ₃ -unit is successfully entrapped inside the icosahedral-C ₈₀ cage.

Photoelectrocatalytic technology (PEC) is an emerging green and sustainable technology for treating antibiotic wastewater. However, its effectiveness is limited by the recombination of photogenerated carriers. To address this issue, the Fenton reaction, an advanced oxidation process, can be coupled with PEC technology to enhance the oxidative degradation of antibiotic wastewater. This research involved creating a Zn_0.5Ni_0.5Fe₂O₄/silicon nanowires (SiNWs) Z‐type heterojunction through the spin coating technique, which was then utilized in the PEC coupled Fenton reaction to break down antibiotic wastewater. The inherent electric field and the voltage applied hastened the segregation of e⁻ and h⁺ within the system. These advantages make the Zn_0.5Ni_0.5Fe₂O₄/SiNWs heterojunction highly efficient in removing various antibiotics, including tetracycline (TC), ciprofloxacin (CIP), amoxicillin (AMX), and levofloxacin (LVX). In particular, the Zn_0.5Ni_0.5Fe₂O₄/SiNWs heterojunction demonstrated an 82.21% degradation efficiency for TC, exhibiting a kinetic constant (k) of 0.02688 min⁻¹, a rate 2.82 times (4.80 times) greater than that of SiNWs. Experimental findings reveal that Zn_0.5Ni_0.5Fe₂O₄/SiNWs exhibit superior light absorption properties and a reduced rate of photogenerated charge recombination. The doping of Zn_0.5Ni_0.5Fe₂O₄ effectively improves the catalytic performance of SiNWs. This research offers fresh insights into researching PEC‐coupled Fenton reaction methods for the degradation of antibiotics and paves the way for advancing the creation of more potent photoelectrochemical catalysts in the future.