Fig. 5 | Nature Communications

Fig. 5

From: Two-site H2O2 photo-oxidation on haematite photoanodes

Fig. 5

Bi-stability and hysteresis. a Coexistence parameter space for the computed normalized photocurrent voltammograms showing the distinct regions of coexisting solutions. 2D projection of the manifold describing the computed normalized photocurrent voltammograms (j/jmax) as a function of the applied dimensionless potential (φ) and H2O2 concentration (p3), showing the coexistence (bi-stability) regime of the normalized photocurrent (the grey shaded area). The bold dashed line indicates the threshold between observable and non-observable hysteresis. b, c Simulated normalized photocurrent voltammograms at p3 = 0.5 and 0.1, respectively. Solid lines indicate stable solutions, whereas dashed lines indicate unstable ones. The transition points from stable to unstable solutions and vice versa in b, c are, respectively, marked in a

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