Electrooxidation of methanol on doped polypyrrole films in acidic media

Abstract

Electrooxidation of methanol was realised on platinum and perchlorate anion doped polypyrrole film electrodes in acidic media. A systematic kinetic investigation was performed and optimum experimental conditions for the preparation of the electrocatalytic system were determined. The presence of ClO 4 − anions was confirmed by XPS analysis of the doped polymer matrix.

The improvement of methanol oxidation using nano-electrocatalysts

“…This has been used to determine the tolerance of such catalysts to CO, an intermediate oxidation alcohol; with larger values regarded as a positive sign that the material synthesised is an excellent CO resistant catalyst. [25] The increase in I f /I b ratio could be attributed to the removal of CO poisoning on the Pt surface by the surface oxygen of the nanoparticles of LaMnO 3 perovskite that is in adjacency of metal particles. [24] It is clear that both the synergistic effect between platinum nanoparticles and structure effects of the LaMnO 3 enhanced the catalytic activity of the presented nanocomposite for methanol oxidation.…”

“…Plots of the logarithm of current density (log J) vs. the logarithm of concentration (log C) give the overall reaction order with respect to the initial concentration of methanol ( Figure 5(B)). [25] The reaction order, derived from the slope of the straight line was 0.586 for the positive and 1.411 for the negative sweep. It is clear at Figure 5(A) that the slope of current density increasing in the lower methanol concentrations was higher compared with the upper methanol concentration.…”

Physioelectrochemical Investigation of Electrocatalytic Activity of Modified Carbon Paste Electrode in Alcohol Oxidation as Anode in Fuel Cell

“…This stems from the facts that methanol is a relatively high energy density fuel, liquid at ambient temperature, low cost and available at industrial scale, the infrastructures for production and distribution are already available. [3][4][5][6][7][8][9][10][11][12] One of the impeding problems in the commercialization is perhaps the high over-potential associated with the direct electro-oxidation of methanol. Although electro-catalysts based on Pt 13) and Pt-Ru alloys 14,15) have been developed and indeed exhibit good activities, high costs of these materials are often very prohibitive.…”

Electrocatalytic oxidation of methanol on poly(vinylferrocene) modified Pt electrode

“…Polymer films with modified electrodes are widely used because they can be stably modified on an electrode surface and can thus provide more active sites. A number of polymeric films, such as poly(ophenylenediamine) (PoPD) [6], polypyrrole (PPY) [7,8], polyaniline (PANI) [9][10][11][12][13][14], polythiophenes [15], poly(3,4-ethylenedioxythiophene) (PEDOT) [16], polyvinylferrocenium [17] and so forth, have been investigated as conducting catalyst supports for methanol oxidation. These polymers offer great advantages due to their very good conducting and mechanical properties and good adhesion to the electrode substrate.…”

“…For electrooxidation of methanol, studies show that all efficient catalysts have been based on platinum [7,8,[12][13][14][15]. This noble metal is known to activate the dissociative adsorption of methanol at an appreciable rate.…”