Platinum–palladium loaded polypyrrole film electrodes for the electrooxidation of d-glucose in neutral media

Abstract

Modified polymer films with metal particles incorporated into the films by electrodeposition are known as possible electrocatalysts for various electrode reactions such as fuel cell applications. This work presents some results concerning the electrooxidation of D-glucose at modified polymer film electrodes prepared on a platinum substrate. This reaction has a great deal of interest in view of its applications to detection systems (glucose sensor), fuel cells (pacemakers) and electroorganic systhesis. The modified polymer film electrodes contain platinum and/or palladium particles dispersed in the polypyrrole film by electrodeposition in neutral media. Addition of palladium to platinum modifies the electrocatalytic behaviour of the electrode drastically. The modification is thought to involve minimisation of the poisoning of the catalyst, hence increasing its electrode activity.

Oxidation and photo-induced oxidation of glucose at a polyaniline film modified by copper particles

“…In particular, there are a number of reports on the incorporation of noble metal particles in a polyaniline or polypyrrole matrix and the catalytic oxidation of carbohydrate molecules, such as glucose, at these particles [11,12].…”

“…For example, Becerik et al [4,12] have shown that more efficient oxidation of d-glucose occurs at palladium-or platinum-dispersed polypyrrole electrodes than at pure palladium or platinum substrates. Likewise, Guascito et al [3] have observed the oxidation of glucose in an alkaline NaOH solution at a copper-dispersed poly-3-methylthiophene substrate.…”

Electrooxidation of methanol on doped polypyrrole films in acidic media

“…In order to check whether there is any effect of the Pt substrate on the oxidation of methanol on a Pt-dispersed PPy coated electrode, we carried out two types of experiments [9]: 1. We recorded the surface sensitive XPS spectra of Pt (substrate)/PPy and Pt (substrate)/PPy/Pt electrodes.…”

“…Development of intrinsically conducting polymers [8] with almost metal-like charge transport properties has led to very efficient electrode materials. Polypyrrole (PPy) is one such conducting polymer used for electrocatalytic applications [9]. It is sufficiently conducting and stable under normal experimental conditions [10].…”

Performances of Enzymatic Glucose/O2 Biofuel Cells

“…Furthermore, the oxidation of glucose on high gold content catalysts starts at a very low potential value (i.e. -0.5 V vs. SCE), which can easily be compared with values observed for catalysts such as Pt-Bi, Pt-Sn (Becerik & Kadirgan, 2001) or Pt-Pd (Becerik et al, 1999). …”