Figure 4.
(a) CVs of the powder catalyst CuCoO_P on BDD without (blue) and with HMF (orange), as well as the difference of both (inset) with later electrolysis potential indicated by a grey arrow. (b) Current density (blue) and charge (orange) per time for electrolysis at 1.52 V vs Hg/HgO with Pt cathode electrode in a divided cell.