Electroanalytical Applications of Highly Boron-Doped Diamond Electrode

Bioelectroanalysis of pharmaceutical compounds

“…Hterminated surfaces are hydrophobic with high conductivity (negative electron affinity), whereas O-terminated surfaces are hydrophilic with low conductivity (positive electron affinity) and the former present relatively high electron transfer rates as pointed out by Suffredini et al [150]. The electrochemical behaviour of BDD electrodes also depends on the dopant concentration (B concentration), structural defects in the diamond film, non-diamond carbon impurity concentration (sp 2 inclusions), grain boundary size (micro and nanodiamond), amongst others [147][148][149][150][151][152].…”

“…A comparison of the effect of anodic and cathodic electrochemical pre-treatments [applying ±3.0 V vs. Ag/AgCl (3.0 M KCl), for 30 min, in 0.5 M H 2 SO 4 ] on the electrochemical response for some redox couples shows that for all redox couples studied, the electroanalytical response was significantly enhanced at the cathodically pre-treated BDD electrode [148,153]. Figure 5 shows (a) cathodic and (b) anodic electrochemical pre-treatments of BDD electrodes and the surface termination with hydrogen-terminated BDD (HT-BDD) and oxygen-terminated BDD (OT-BDD).…”

“…Boron-doped diamond (BDD) electrodes have been used as excellent materials for electroanalytical applications, due to their outstanding properties, which are significantly different from those of other conventional sp 2 carbon electrodes, such as glassy carbon, pyrolytic graphite or carbon paste [147][148][149]. Figure 3 shows scanning electron microscopy and atomic force microscopy imaging of the BDD surface.…”

“…This response time for BDD electrodes is often much less than for other sp 2 carbon electrodes. Good response precision and response stability are obtained using BDD electrodes because sp 2 carbon electrodes are instable over the time resulting in potential changes due surface changes and adsorption of analyte and/or reaction products [147][148][149].…”

Simple Flow Injection Analysis System for Simultaneous Determination of Phenolic Antioxidants with Multiple Pulse Amperometric Detection at a Boron-Doped Diamond Electrode

“…Thin films of BDD have emerged as excellent electrode materials for several electrochemical applications, especially electroanalytical ones, mainly due to such properties as a wide potential window in aqueous solutions (up to 3 V), low background currents, long-term stability, low adsorption, and low sensitivity to dissolved oxygen. [33][34][35][36][37] The properties of BDD are commonly affected by several factors, such as their electronic properties and surface termination. 38 Suffredini et al 39 called to attention that cathodic pretreatment of a BDD electrode dramatically increased the electroanalytical detection limit for chlorophenols, reinforcing the notion that the analytical performance of BDD electrodes greatly depends on their surface termination, that is, whether they are hydrogen-or oxygen-terminated.…”