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. 2019 Mar 14;116(14):6659–6664. doi: 10.1073/pnas.1819382116

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Copyright © 2019 the Author(s). Published by PNAS.

This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).

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Fig. 2. — Structure of the catalysts. (A and B) Representative HADDF-STEM images of Fe₂O₃/FCNT-L and Fe₂O₃@FCNT-H (Insets) HRTEM images of the Fe₂O₃ nanoparticles; dexter figures show the EDX elemental mappings of the selected area. (C) Size-distribution histograms of the Fe₂O₃ nanoparticles in both samples. (D) XRD patterns and (E) Fe 2p XPS spectra of CNT, Fe₂O₃/FCNT-L and Fe₂O₃@FCNT-H. (F) N₂ adsorption–desorption isotherms of Fe₂O₃/FCNT-L and Fe₂O₃@FCNT-H.