At-line monitoring of hydrogen peroxide released from its photocatalytic and continuous synthesis

Providing hydrogen peroxide (H ₂O ₂) for enzyme-catalyzed reactions requires a careful balance between sufficient reactivity and toxicity. Herein, we demonstrate the photocatalytic synthesis of H ₂O ₂ in a continuous operation set-up using nitrogen-doped carbon nanodots (N-CNDs) and simultaneous determination of this in situ synthesis by continuous measurement with a novel developed H ₂O ₂ sensor.