Assessments of the Effect of Increasingly Severe Cathodic Pretreatments on the Electrochemical Activity of Polycrystalline Boron-Doped Diamond Electrodes.

摘要: The electrochemical response of many redox species on boron-doped diamond (BDD) electrodes can be strongly dependent the type chemical termination their surface, hydrogen (HT-BDD) or oxygen (OT-BDD). For instance, an HT-BDD electrode [Fe(CN)6]3–/4– system presents a reversible voltammetric behavior, whereas oxidation overpotential ascorbic acid (AA) is significantly decreased. Moreover, activity BDD affected by pretreatments, with cathodic pretreatments (CPTs) leading to behaviors associated HT-BDD. Here we report effect increasingly severe CPTs highly doped electrode, assessed and AA probes, atomic bonding structure XPS. hydrogenation level surface was increased CPTs, decreases total relative up to...