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Large-scale synthesis of N-doped carbon capsules supporting atomically dispersed iron for efficient oxygen reduction reaction electrocatalysis

引用

eScience 2022年第2期2卷 227-234页

作者： Hui Yang Yanfang Liu Xiaolu Liu Xiangke Wang He Tian Geoffrey I.N.Waterhouse Paul E.Krugere Shane GTelfer Shengqian Ma Department of Chemistry University of North TexasDentonTX76201United States College of Environmental Science and Engineering North China Electric Power UniversityBeijing102206PR China State Key Laboratory of Silicon Materials Center of Electron MicroscopySchool of Materials Science and EngineeringZhejiang UniversityHangzhou310027PR China MacDiarmid Institute for Advanced Materials and Nanotechnology School of Chemical SciencesThe University of AucklandAuckland1142New Zealand MacDiarmid Institute for Advanced Materials and Nanotechnology School of Physical and Chemical SciencesUniversity of CanterburyChristchurch8140New Zealand MacDiarmid Institute for Advanced Materials and Nanotechnology School of Fundamental SciencesMassey UniversityPalmerston North4442New Zealand

The large-scale synthesis of platinum-free electrocatalysts for the oxygen reduction reaction(ORR)remains a grand *** report the large-scale production of stable and active ORR electrocatalysts based on iron,an earth-abundant element.A core–shell zeolitic imidazolate framework–tannic acid coordination polymer composite(ZIF-8@K-TA)was utilized as the catalyst precursor,which was transformed into iron atoms dispersed in hollow porous nitrogen-doped carbon capsules(H-Fe-N_(x)-C)through ion exchange and pyrolysis.H-Fe-N_(x)-C fea-tures site-isolated single-atom iron centers coordinated to nitrogen in graphitic layers,high levels of nitrogen doping,and high permeability to incoming *** from these characteristics,H-Fe-N_(x)-C demonstrated efficient electrocatalytic activity(E_(1/2)=0.92 V,***)and stability towards the ORR in both alkaline and acidic *** ORR performance,it surpassed the majority of recently reported Fe-N-C catalysts and the standard Pt/C *** addition,H-Fe-N_(x)-C showed outstanding tolerance to methanol.

关键词： Metal single atoms hollow carbon capsules Oxygen reduction reaction Metal–organic framework Electrocatalysis

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