Behavior of a Boron-Doped Diamond Monocrystals in Mineral and Organic Acid Solutions
BDD electrodes enable new applications in electrolysis thanks to their wide working window and their capacity to generate very active oxidative species such as OH. radicals. The BDD films used as electrodes are polycrystalline. Their behavior during electrolysis and in particular the role played by the different crystal faces of the grains is still poorly understood. In order to progress in this field, boron-doped monocrystalline diamond (100) grown homo-epitaxially by CVD was characterized using SEM and AFM. Cyclo-voltammetry was performed in acidic and organic solutions in order to study the monocrystal behavior and its stability when used as an electrode. Particular attention was paid to changes in the working window and the surface topography during the tests.