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Monitoring dynamics of defects and single Fe atoms in N-functionalized few-layer graphene by in situ temperature programmed scanning transmission electron microscopy

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Journal of Energy Chemistry 2022年第1期31卷 520-530,I0014页

作者： Rosa Arrigo Takeo Sasaki June Callison Diego Gianolio manfred erwin schuster School of Science Engineering and EnvironmentUniversity of SalfordManchester M54WTUK Diamond Light Source Harwell Science and Innovation CampusDidcot 0X1/ODEUK JEOL UK Ltd.JEOL House 1-2 Silver CourtWatchmeadWelwyn Garden CityHerts AL71LTUK Department of Chemistry University College London20 Gordon StreetLondon WC1H OAJUK UK Catalysis Hub Research Complex at Harwell(RCaH)Rutherford Appleton LaboratoryHarwell Oxon 0X11 OFAUK Johnson Matthey Technology Centre Reading RG49NH.UK

In this study,we aim to contribute an understanding of the pathway of formation of Fe species during top-down synthesis of dispersed Fe on N-functionalized few layer graphene,widely used in *** use X-ray absorption spectroscopy to determine the electronic structure and coordination geometry of the Fe species and in situ high angle annular dark field scanning transmission electron microscopy combined with atomic resolved electron energy loss spectroscopy to localize these,identify their chemical configuration and monitor their dynamics during thermal *** show the high mobility of peripheral Fe atoms,first diffusing rapidly at the trims of the graphene layers and at temperatures as high as 573 K,diffusing from the edge planes towards in-plane locations of the graphene layers forming three-,four-coordinated metal sites and more complexes polynuclear Fe *** process occurs via bond C-C breaking which partially reduces the extension of the graphene ***,the vast majority of Fe is segregated as a metal *** dynamic interconversion depends on the structural details of the surrounding graphitic environment in which these are formed as well as the Fe loading.N species appear stabilizing isolated and polynuclear Fe species even at temperatures as high as 873 *** significance of our results lies on the fact that single Fe atoms in graphene are highly mobile and therefore a structural description of the electroactive sites as such is insufficient and more complex species might be more relevant,especially in the case of multielectron transfer *** we provide the experimental evidence of the formation of these polynuclear Fe-N sites and their structural characteristics.

关键词： HAADF-STEM Single Fe atom sites N-doped Few-layer graphene Dinuclear Fe species

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Corrigendum to“Monitoring dynamics of defects and single Fe atoms in N-functionalized few-layer graphene by in situ temperature programmed scanning transmission electron microscopy”[JECHEM 64(2022)520-530]

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Journal of Energy Chemistry 2022年第8期31卷 657-657页

作者： Rosa Arrigo Takeo Sasaki June Callison Diego Gianolio manfred erwin schuster School of Sciences Engineering and EnvironmentUniversity of SalfordManchester M54WTUK Diamond Light Source Harwell Science and Innovation CampusDidcot OX110DEUK JEOL UK Ltd.JEOL House 1-2 Silver CourtWatchmeadWelwyn Garden CityHerts AL71LTUK Department of Chemistry University College London20 Gordon StreetLondon WC1H 0AJUK UK Catalysis Hub Research Complex at Harwell(RCaH)Rutherford Appleton LaboratoryHarwell Oxon OX110FAUK Johnson Matthey Technology Centre Reading RG49NHUK

The authors regret that the word“trim/trims”has been wrongly used in the overall text,and instead the correct word“edge/edges”should have been *** authors would like to apologise for any inconvenience caused.

关键词： word instead dynamics

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