ELECTROCHEMISTRY AND ELECTROCATALYSIS WITH MYOGLOBIN IN 2C₁₂N⁺PSS⁻ MULTIBILAYER COMPOSITE FILMS

Abstract

Stable thin films made from polyionic complex didodecyldimethylammonium polystyrenesulfonate (2C₁₂N⁺PSS⁻) with incorporated myoglobin (Mb) on pyrolytic graphite (PG) electrodes were characterized by voltammetry and other techniques. The Mb-2C₁₂N⁺PSS⁻ films showed a pair of near reversible CV peaks for MbFe(III)/Fe(II) couple at about −0.19 V vs. SCE in pH 5.5 buffers. The electron transfer between Mb and PG electrodes was greatly enhanced in 2C₁₂N⁺PSS⁻ films. MbFe(I) was also produced in these films at about −1.08 V, and could be used to catalytically reduce some organohalide pollutants. The potential applications of the film electrode as a sensor for detecting the organohalides are discussed.

Keywords:

• Myoglobin
• Electrochemistry
• Electrocatalysis
• Didodecyldimethylammonium polystyrenesulfonate

ACKNOWLEDGMENT

The support from the National Natural Science Foundation of China is acknowledged.