▎ 摘　　要

Reduced graphene oxide-supported palladium nanocomposites (Pd-rGO) were synthesized by an in situ chemical reduction method. The composite nanomaterials have excellent conductivity and catalytic ability due to the synergistic effect of the two components. Experiments show that Pd-rGO has a prominent advantage in electrochemical catalysis for NADH. The oxidation potential of NADH at the Pd-rGO/GCE is negatively shifted by 0.6 V relative to that at the rGO/GCE. The measurement of NADH can be obtained with a high sensitivity of 110 nA.mu M-1.cm(-2) under the low potential of 0.0 V, with minimal interference. The concentration range of NADH was between 0.31 mu M and 350 mu M, with a detection limit (S/N = 3) of 93 nM.