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a–c) Schematic illustrations of the fabrication process of MnO2/nanoporous gold electrodes by electroplating using a three‐electrode setup (WE: working electrode; CE: counter electrode; RE: reference electrode). Reproduced with permission.307 d) Fabrication process of the Au‐doped MnO2 electrodes. e,f) STEM images of the Au‐doped MnO2. The inset of f) indicates the intensity difference between Au‐occupied columns and undoped Mn‐O atomic columns. Reproduced with permission.309
