Fig. 4: Dynamic evolution monitoring of oxygen groups on O-DG catalysts. | Nature Communications

Fig. 4: Dynamic evolution monitoring of oxygen groups on O-DG catalysts.

From: Unveiling the dynamic active site of defective carbon-based electrocatalysts for hydrogen peroxide production

Fig. 4: Dynamic evolution monitoring of oxygen groups on O-DG catalysts.

a Ex-situ XPS O 1s spectra of O-DG-30 with CV activation. b The variation of O containing groups after CV activation. c In-situ attenuated total reflectance infrared (ATR-IR) spectra of O-DG-30 at various potentials. d The possible atomic structures of the O-groups and relevant surface species on defective graphene (Gray: C atom, red: O atom, gray white: H atom). e The calculated IR spectra of three possible atomic structures of the O-groups and relevant surface species on defective graphene.

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