酸素分子から過酸化物への選択的電気化学的還元のためのビスムテン量子ドットの電気化学的調製

Bismuthene quantum dots (BiQDs), as a zero-dimensional (0D) material, offer significant potential in electrocatalysis due to their quantum confinement, edge effects, and unique electronic structure. Herein, we report a facile electrochemical exfoliation strategy for the synthesis of crystalline BiQDs (lateral dimensions of 2.2 nm) in N-methylpyrrolidone (NMP) at room temperature. Their electrocatalytic activity towards the oxygen reduction reaction (ORR) in alkaline media is systematically evaluated. The observed Tafel slope of approximately 40 mV dec^-1 and the high exchange current density (6.0 × 10^-8 A cm^-2) indicate notable kinetic improvements over conventional Pt-based electrocatalysts and enhanced cycling stability. BiQDs exhibit enhanced ORR performance following a two-electron transfer mechanism. This work highlights the promising role of BiQDs as efficient and environmentally friendly ORR electrocatalysts.