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. 2023 Jul 21;19(15):5199–5209. doi: 10.1021/acs.jctc.3c00359

Figure 10.

Figure 10

Graphene oxide with proton charge. (a) Snapshot of the carboxyl-terminated electrode surface with a 10% surface coverage of OH (electrolyte solution is not shown for clarity, and the location of deprotonated carboxyl groups are highlighted). (b) Electrode charge as a function of the applied potential. VPZEC is identified when the electrode charge becomes zero. (c) Helmholtz capacitance for the positive and negative electrodes as a function of the surface coverage of OH. Dashed line corresponds to the positive electrode, while dotted line corresponds to the negative electrode. (d) Total charge density of ionic species as a function of the distance to the negative/positive electrode at the point of zero free charge (PZFC). The distance is taken from the position of the carbon plane.

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