Figure 8.
CVs obtained for the reduction of 1 mM H2O2 at (a) bare GCE, (b) GCNNS, (c) Co3S4, (d) Co3S4/GCNNS and (e) at Co3S4/GCNNS in the absence of H2O2, in 0.2 M PBS (pH 7.2) at a scan rate of 50 mV/s.
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