Investigation of anomalous hydrogen evolution from anodized magnesium using a polarization routine for scanning electrochemical microscopy

• SECM investigation of anomalous hydrogen evolution on 99.9% Mg and AZ63 alloy. Three-stage anodization procedure for the monitoring rates reaction (HER) Separation effects noble impurities from reactivity oxy-hydroxide layer Mg. Enhanced H 2 by facilitating formation either pure Greater pre-polarized surfaces compared to non-polarized ones. With goal facilitate a new experimental anodically-polarized magnesium-based materials, this paper presents application three-step (off-on-off) operation sequence amperometric scanning electrochemical microscopy (SECM) recently proposed our group characterization magnesium in aqueous saline solution. The measurements done above prepolarized nonpolarized provided information metal, whereas other experiments are presented that enable monitor effect formed metal under anodic polarization. In addition, direct comparison data obtained with those previously alloy contributed separate catalytic hydrogen-evolution reaction.