Can I read Electrocatalytic Activity of a New Nanostructured Polymeric Tetraruthenated Porphyrin Film for Nitrite Detection on EtoBox?

Electrocatalytic Activity of a New Nanostructured Polymeric Tetraruthenated Porphyrin Film for Nitrite Detection by Herbert Winnischofer; Simone de Souza Lima; Koiti Araki; Henrique Eisi Toma is a Chemistry article available to read on EtoBox.

What is Electrocatalytic Activity of a New Nanostructured Polymeric Tetraruthenated Porphyrin Film for Nitrite Detection about?

The preparation of the monomer and thin films of a new polymeric tetraruthenated porphyrin material and their characterization by spectroscopic and electrochemical techniques, are described. This material is one of the most active electrocatalyst for the oxidation of nitrite ions to nitrate, exhibiting a heterogeneous cross-exchange rate constant (k f = (6.2±0.1×10 4 ) M -1 s -1 ) 30 times higher than that previously described for the electrostatic assembled porphyrin films. The polymeric films were obtained by electropolymerization of the corresponding molecular films, previously prepared by dip-coating. This strategy leads to an increase in the efficiency of the reticulation process while minimizing the amount of monomer necessary for the preparation of the modified electrodes. The conductivity of the thin films close to the E 1/2 of the Ru(III/II) redox pair is very good, decreasing rapidly as the applied potential departs from it, as expected for a redox polymer. The conductivity decreases when the surface concentration becomes higher than 1.2 × 10 -8 mol cm -2 also, reflecting a higher impedance for electrolyte diffusion inside the polymeric material. The high electrocatalytic

Who reads Electrocatalytic Activity of a New Nanostructured Polymeric Tetraruthenated Porphyrin Film for Nitrite Detection?

Author

Herbert Winnischofer; Simone de Souza Lima; Koiti Araki; Henrique Eisi Toma

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0003-2670)

Published

2003

Language

EN

Field

Chemistry (Physical Sciences)