Electrochemical sensor based on Prussian blue nanorods and gold nanochains for the determination of H2O2

In this paper, a novel electrochemical sensor for the detection of H 2 O 2 was proposed based on gold nanochains and prussian blue nanorods (PB@MWCNTs), which were synthesized with multiwall carbon nanotubes (MWCNTs) as a template. With the introduction of MWCNTs and the gold nanochains, the proposed system shows synergy among the Prussian blue (PB), MWCNTs, and the gold nanochains, which amplifies the H 2 O 2 sensitivity greatly. A linear range from 1.75 × 10 −6 to 1.14 × 10 −3 M with a detection limit of 0.5 × 10 −6 M ( S / N = 3) and a high sensitivity 300 μA mM −1 cm −2 for H 2 O 2 detection is obtained. Moreover, the sensor exhibits good repeatability and stability.