Surface morphology-assisted electrochemical conversion of carbon dioxide to formic acid via nanocrystalline boron-doped diamond electrodes

This research investigated the fabrication and characterization of nanocrystalline boron-doped diamond (BDD) electrodes for carbon dioxide (CO₂) electroreduction. By employing scalable chemical vapor deposition techniques and modifying synthesis conditions, BDD electrodes with varying crystallinity and surface morphologies were obtained. Notably, BDD electrodes with ball-shape surface features exhibited significantly enhanced formic acid selectivity, achieving a Faradaic efficiency of up to 80.4%. These findings demonstrate the crucial role of BDD electrode structure and composition in determining the efficiency and selectivity of CO₂ electroreduction.