(HQ, 1,4-dihydroxybenzene) were investigated by cyclic voltammetric
measurements. As shown in Fig. 2, the CVs were given in
the potential range of
−400 to 300 mV in PBS (pH 7.0) with scan
rate of 50 mV s−1. No redox peak for CC and HQ was observed
at the bare GCE (the curve a of Fig. 2A and B) and OSi@CS/GCE
(the curve b of Fig. 2A and B). When the electrode was modified
with Au-OSi@CS nanocomposites, a relatively small redox peak can
be observed for CC and HQ (curve c of Fig. 3A and B). After the
Pt-Au-OSi@CS nanocomposites deposited on the electrode, welldefined
reduction peaks can be seen (the curve d of Fig. 2A and B).
The result showed that the Pt-Au-OSi@CS nanocomposites exhibited
excellent electrocatalytic response for the reduction of CC and