Boron Doped Diamond Electrodes

Boron-doped diamond (BDD) electrodes have emerged as next-generation electrode materials for various applications in electrochemistry such as electrochemical sensors, electrochemical organic synthesis, CO2 reduction, ozone water generation, electrochemiluminescence, etc. An optimal BDD electrode design is necessary to realize these applications. The electrochemical properties of BDD electrodes are determined by important parameters such as (1) surface termination, (2) surface orientation, and (3) boron doping level.

Applications to electrochemical sensors, which takes advantage of the wide potential window, small background current, and resistant to biofouling and biocompatible with organisms, has attracted particular attention in recent years, and the development in industrialization is also remarkable. For example, so far, we have reported the electrochemical sensor applications of free chlorine, heavy metals, chemical oxygen demand (COD), biochemical oxygen demand (BOD), protein, dopamine, oxytocin, glucose, oxalic acid, glutathione, drugs, influenza virus, and so on [1,3]. However, there are only a limited number of examples of gas sensing using BDD electrodes, because the superior properties of BDD electrodes are particularly effective in aqueous solution.