We attributed this superb performance
to the essential synergic effect rooting in the judicious
choice of materials and their assembly into well-defined sandwich
nanostructures (e.g., PB/CdS/CNT), wherein electron–hole pairs
separated in CdS upon photo radiation, the electrons flowed into
PB due to its relatively low Fermi level, and PB electrochemically
catalyzed the reduction of H2O2 via an ECE mechanism.