Single-atom iron on semi-hollow carbon synthesized by chemical waste-vapor assistance: A superior catalyst for polychlorinated biphenyls degradation  

作　　者：Bingqing Wang Xu Han Jiaqiang Sun Zhichao Yun Yonghai Jiang 

机构地区：[1]State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China [2]State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution,Chinese Research Academy of Environmental Sciences,Beijing 100012,China [3]Department of Chemistry,National University of Singapore,Singapore 117543,Singapore [4]Anhui Basic Discipline Research Center for Clean Energy and Catalysis,College of Chemistry and Materials Science,Anhui Normal University,Wuhu 241002,China

出　　处：《Nano Research》2025年第2期164-172,共9页纳米研究(英文版)

基　　金：This work was financially supported by the fellowship of China Postdoctoral Science Foundation(No.2020M680505)。

摘　　要：Single-atom site catalysts(SACs)with high atom utilization efficiencies exhibit unexpected properties,making them ideal candidate catalysts for numerous reactions.Herein,we report a chemical-waste-vapor-assisted(CWVA)strategy for the synthesis of a catalyst with single atom Fe on semi-hollow N-doped carbon(SA-Fe/SHNC).Benefitting from its atomic Fe sites,the prepared catalyst exhibited a 103-fold higher activity(0.827 vs.0.008mol_(PCB-209)·mol_(M)^(-1)·h^(-1))and much longer time-stability(more than 50 vs.0.5 h)than benchmarked Fe_(3)0_(4) nanoparticles toward decachlorobiphenyl(PCB-209)degradation.Experiments and density functional theory calculations revealed that the highly active isolated Fe sites are responsible for the activity of Fe-SAC/SHNC.In addition,the CWVA method was shown to be applicable for synthesizing other single atoms on various structured supports,thereby providing new opportunities for the design of various structured SACs for different applications.

关 键 词：single-atomic site catalyst chemical-waste-vapor Fe-N-C hollow structure polychlorinated biphenyls(PCBs) 

分 类 号：O64[理学—物理化学]