Journal ArticleDOI
Electrochemical polymerization of amino-, pyrrole-, and hydroxy-substituted tetraphenylporphyrins
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TLDR
In this paper, the properties of cobalt tetrakis(o-aminopheny1) porphyrin polymers are described and compared to those of polypyrin solutions in acetonitrile or methylene chloride.Abstract:
are described. Oxidations of these monomers lead to thin polymeric coatings on electrodes by coupling reactions analogous to those operative in polyaniline, polypyrrole, and polyphenol electropolymerization. The films contain from two to several hundred layers of porphyrin sites and display reductive electrochemical and electronic spectroscopic properties similar to those of monomer solutions in acetonitrile or methylene chloride. The pyrtolyl- and amino-based polymers are polycationic and thus anion exchangers, whereas the hydroxy-based polymers (at pH >8) are polyanionic. Films prepared from electropolymerization of cobalt tetrakis(o-aminopheny1)porphyrin display a split Co(III/II) wave in aqueous acid and base and are good oxygen reduction catalysts, whereas films prepared from all other cobalt porphyrin monomers display only one Co(III/II) wave and are poor catalysts.read more
Citations
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Porous organic polymers in catalysis: Opportunities and challenges
TL;DR: Porous organic polymers (POPs) can be divided into three major classes: rigid well-defined homogeneous catalysts as building blocks, POPs modified post-synthesis, and POPs that encapsulate metal particles.
Journal ArticleDOI
Polypyrrole : a conducting polymer; its synthesis, properties and applications
TL;DR: In this paper, the synthesis, properties and applications of polypyrrole (PPy), a representative of conducting polymers, are reviewed, in particular, synthesis of PPy from pyrrole derivatives with the appropriate electroactive groups and introduction of electroactive dopant anions.
Journal ArticleDOI
Nickel as a catalyst for the electro-oxidation of methanol in alkaline medium
TL;DR: In this article, the use of Ni as a catalyst for the electro-oxidation of methanol in alkaline medium was studied by cyclic voltammetry and it was found that only Ni dispersed on graphite shows a catalytic activity towards methanoline oxidation but massive Ni does not.
Journal ArticleDOI
Functionalized polypyrroles. New molecular materials for electrocatalysis and related applications
TL;DR: In this paper, the pyrrole group is used for electrocatalytic polymerization of polypyrrolic polymers, which can be applied to a wide range of applications, including bio-and electroanalysis, microelectronics, and electroreleasing devices.
Journal ArticleDOI
Electrocatalytic oxidation of methanol on Ni and NiCu alloy modified glassy carbon electrode
TL;DR: In this article, a cyclic voltammogram of NiCu alloy demonstrates the formation of β/β crystallographic forms of the nickel oxyhydroxide under prolonged repetitive potential cycling in alkaline solution.
References
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Journal ArticleDOI
Molybdenum-containing enzymes
R. C. Bray,J. C. Swann +1 more
TL;DR: So little is known about molybdenum enzymes other than milk xanthine oxidase that there is little to be said by way of general conclusions, but in all cases where there is direct evidence (except possibly forxanthine dehydrogenase from Micrococcus lactilyticus) it seems that molyBdenum in the enzymes does have a redox function in catalysis.
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