Kinetics and mechanism of electro-oxidative polymerization of m-cresol on Pt electrode catalysed by trimethylamine

✍ Scribed by S. Sankarapapavinasam

• Book ID: 103074329
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 355 KB
• Volume: 30
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(94)90233-x

✦ Synopsis

The kinetics and mechanism of electropolymerization of m-cresol (mC) on Pt electrode catalysed by trimethylamine (TMA) has been studied in acetonitrile. The rate of polymerization shows first order dependences on monomer concentration and current and fractional order on [TMA] at lower current densities; at higher current densities, the rate is independent of current density. A suitable mechanism has been proposed and a rate equation is derived to explain the observed features. Rotating disc studies reveal that, at low current densities, the rate of polymerization is charge-controlled but, at high current densities, it is diffusion-controlled. Conditions for obtaining selective products with high current efficiency have been established. Factors limiting film thickness have been identified.