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. 2017 Aug 3;7:7186. doi: 10.1038/s41598-017-06812-w

Figure 2.

Figure 2

Comparison of cyclic voltammograms of the electrocatalyst with and without phosphoric acid in the electrolyte. (a) Pt/C and (b) Ptskin/Pt3Co/C electrocatalyst in 0.1 M HClO4 with (red) and without (black) 0.01 M H3PO4. Magnified anodic sweep of cyclic voltammograms of (c) Pt/C and (d) Ptskin/Pt3Co/C electrocatalyst.