Figure 5
From: Innovative Strategy on Hydrogen Evolution Reaction Utilizing Activated Liquid Water

Linear sweep voltammograms of hydrogen evolution in DI water containing 0.5 M H2SO4 at an electrochemically roughened Au electrode under illumination with different light sources.
(a) SEM image of the roughened Au electrode (0.283 cm2) which was prepared by using electrochemical oxidation-reduction cycles (ORCs). (b) The sketch reveals the combination of in situ producing and splitting (H)RHBW). (c) LSVs of hydrogen evolution in DI water containing 0.5 M H2SO4 at an electrochemically roughened Au electrode with different illumination sources (lamp and green-light LED).