TEMPO-Functionalized Nanoporous Au Nanocomposite for the Electrochemical Detection of H₂O₂

Figure 6

(a) Chronoamperometric responses observed at (A) bare GCE, (B) np-AuNPs/GCE, (C) TEMPO-np-AuNPs/GCE, and (D) TEMPO-np-AuNPs/GCE after successively injecting H₂O₂, in 0.1 M PBS (pH=7.0). Applied potential: 1.10 V and the calibration plot between the oxidation current and the H₂O₂ concentration (b and c). (d) Amperometric response of H₂O₂ and interferants at TEMPO-np-AuNPs/GCE at 1.10V in PBS (0.1 M, pH = 7.0). Injection sequence: 0.1mM H₂O₂, 100 mM SC, 100 mM GC, 100 mM DA, 100 mM AA, and 0.2 mM H₂O₂.

(a)

(b)

(c)

(d)