Selective catalytic oxidation of sulfonamides for targeted hydroxybenzene sulfonate production via modulating surface complexes on Mn-doped Co3O4

作者：Jiaying Zhang, Lin‐Feng Zhai, Sheng-Nan Tang, Hao-Li, Zhuofeng Hu, Min Sun · 发表于：Applied Catalysis B: Environmental · 年份：2025 · DOI：10.1016/j.apcatb.2025.125750 · 被引用次数：3 · 研究领域：Nanomaterials for catalytic reactions、Catalytic Processes in Materials Science、Catalysis and Hydrodesulfurization Studies

This study presents a novel nonradical catalytic oxidation system for targeted p-hydroxybenzene sulfonate (PHS) production from sulfonamides (SAs). A positive external electric field was applied to induce the in-situ activation of O 2 on Mn-doped Co 3 O 4 surface, with Mn-doping used to manipulate the reactivity of surface complexes. Theoretical simulations predicted CoMn-peroxides as thermodynamically favorable candidates for the targeted PHS production. Experimental validation achieved PHS yields of 18.4–32.6 % from five typical SA compounds. While 1 O 2 also actively participated in the oxidation of SAs, disruption of the 1 O 2 oxidation pathway significantly enhanced the PHS yields to 47.6–50.3 %. The intensity of electric field regulated the O 2 activation pathways by influencing the stability of CoMn-peroxides. This nonradical catalytic oxidation system demonstrated excellent catalyst reusability and environmental robustness for energy-efficient SAs removal and PHS recovery. These findings provide new insights into leveraging nonradical = pathways to advance catalytic oxidation technology for sustainable water management. • A nonradical catalytic oxidation system relying on surface complexes is developed. • Targeted p-hydroxybenzene sulfonate production from sulfonamides is achieved. • O 2 is activated into peroxo-species on Mn-doped Co 3 O 4 under electric stimulation. • DFT calculation proves metal-doping could control reactivity of peroxo-species. • Electric field af...