Fig. 7: Schematic drawing of the observed inverse relationship between ORR and HER activity. | npj Materials Degradation

Fig. 7: Schematic drawing of the observed inverse relationship between ORR and HER activity.

From: Oxygen-sensitive nanoparticles reveal the spatiotemporal dynamics of oxygen reduction during magnesium implant biodegradation

Fig. 7

a When H2 evolution is high, gas bubbles on the Mg alloy surface will hinder access of O2 to the sample surface and lower the ORR. b Intermediate stage. c High rates of O2 consumption are related to lower H2 evolution. The study results indicate that higher ORR may be related to the Mg–6Ag alloy in particular and increased degradation rates for other alloys.

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