Corresponding Author

Jian-feng FAN(fjf3034832@126.com)


The modified electrodes have been fabricated by generation of Au nanoparticle chains, which was produced by reaction between HAuCl4 and sodium citrate without any additional capping agents or surfactants. The self-assembled Au nanoparticles were attached to the surface of glassy carbon electrode (GCE) layer by layer, using L-methionine (L-Met), thiourea (TU), allyl thiourea (ATU) and polyvinylpyrrolidone (PVP) as a crosslinking agent, respectively. The experimental results showed that the electrochemical performance of the different modified electrodes varied in [Fe(CN)6]3-/4- solution. The Au/L-Met/GCE exhibited an excellent electrochemical property, which is superior to other modified electrodes. In addition, the catalysis of Au/L-Met/GCE to hydrogen peroxide (H2O2) also performed a good sensitivity to electrochemical oxidation of H2O2 during cyclic voltammetry and chronoamperometry analyses. And the linear range and detection limit for H2O2 were 2×10-7 ~ 3×10-3 mol·L-1 and 6.67×10-8 mol·L-1, respectively.

Graphical Abstract


Au nanoparticles chains, crosslinking agent, electrochemistry, catalytic oxidation

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