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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Electrocatalytic Study of the Thin Metallopolymer Film of [2,2 `-[1,2-Ethanediylbis[Nitrilo(1E)-1-Ethyl-1-Ylidene]]Diphenolate]-Nic kel(II) for Ethanol Electrooxidation

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Olean-Oliveira, Andre [1] ; Pereira, Camila F. [1] ; David-Parra, Diego N. [1] ; Teixeira, Marcos F. S. [1]
Total Authors: 4
[1] Sao Paulo State Univ UNESP, Sch Sci & Technol, Dept Chem & Biochem, Rua Roberto Simonsen 305, BR-19060900 Presidente Prudente, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: CHEMELECTROCHEM; v. 5, n. 22, p. 3557-3565, NOV 13 2018.
Web of Science Citations: 0

The present paper describes the electrochemical activity of a Ni(II)-Schiff base metallopolymer electrode for the oxidation of ethanol in alkaline media. The scanning electron microscope results show that the metallopolymer at the glassy carbon surface has a nanoflake-like lamellar structure, and there is no molecular structural change after treatment with NaOH. Voltammetry measurements indicate that the metallopolymer acts as efficient material for the electrocatalytic oxidation of ethanol, where a high-valent nickel(IV) was revealed as the reactive intermediate during the anodic scan. An isopotential point can be observed in rotating disk electrode voltammetry for ethanol oxidation. The electrode surface may be considered to consist of two independent electrochemical regions, one corresponding to the ethanol electro-oxidation by nickel(IV) and the second corresponding to water oxidation. The Tafel slopes were found to be 246 mV dec(-1) at low overpotentials and 44 mV dec(-1) at high overpotentials, which suggest that the first electron transfer step is the rate controlling step. The specific activity of the metallopolymer-modified electrode for the ethanol electro-oxidation reaction was 6.66 mA cm(-2) for 0.130 mu mol cm(-2) of electroactive species of metallopolymer at 0.6 V vs. SCE. (AU)

FAPESP's process: 16/09017-1 - Study of the film formation of Schiff base metallic complexes
Grantee:Marcos Fernando de Souza Teixeira
Support type: Regular Research Grants
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC