To achieve efficient photoelectrochemical conversion of CO2 into useful chemicals and oxidation of organic pollutants in water, development of new approaches is required. By coupling silicon photoelectrodes and nanocrystalline boron-doped diamond electrodes, sunlightdriven degradation of organic pollutants along with reduction of CO2 in water can be achieved. In such a system, electrically conductive, optically transparent nanocrystalline boron-doped diamond layer grown from inexpensive precursors serves as a protection barrier against oxidation of silicon photoelectrodes, while allowing for efficient charge carrier transfer to a liquid media for electrochemical oxidation or reduction processes. To achieve this objective, physical, chemical and photo-electrochemical properties of nanocrystalline boron-doped diamond need to be systematically studied.
Nanocrystalline diamond electrodes for photo-electrochemical applications: CO2 reduction and degradation of organic contaminants in water