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Preparation of G-FeCoWoxyhydroxides catalysts. (A) Schematic illustration of the preparation process for the gelled structure and pictures of the corresponding sol-gel and gelled film. (B) HAADFSTEM image of nanoporous structure of G-FeCoW. (C) SAED pattern. (D) Atomic-resolution HAADFSTEM image. (E) EELS elemental mapping from the G-FeCoW oxyhydroxide sample. (Reprinted with permission from Ref. [78], Copyright 2016, Science).
