Electrochemical investigation on the film of L-cysteine self-assembled to nanoparticles on a gold electrode

Wenting Wang, Chunming Wang, Xiaoquan Lu

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Department of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, China.

DOI: 10.4236/jbpc.2012.31005                

Abstract

The film contained L-cysteine and gold nanoparticles were provided by self-assembled monolayers (SAMs) and potentiostatic electrodeposition technology on the gold electrode. Two methods were used to study the film: In the first, cyclic voltammetry (CV) was used to inspect the functional groups of the film and the same time hydroquinone was chosen to be a probe molecule in the based solution; secondly, based on analytical technology of scanning electrochemical microscopy (SECM), the heterogeneous rate constant (k_eff) between solid phase (the modified electrode) and liquid phase (K₃Fe(CN)₆) was obtained. As a result, the better binary catalysis of hydroquinone was demonstrated and the heterogeneous rate constant (k_eff) is the greater at 8 h for L-cysteine self-assembled monolayers (SAMs).

Keywords

SECM; L-Cysteine; Hydroquinone; Self-Assembled Monolayers; Heterogeneous Rate Constant

Conflicts of Interest

The authors declare no conflicts of interest.

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