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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.)

Pt film electrodes prepared by the Pechini method for electrochemical decolourisation of Reactive Orange 16

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Author(s):
Gomes, L. [1] ; Freitas, R. G. [2] ; Malpass, G. R. P. [1] ; Pereira, E. C. [2] ; Motheo, A. J. [1]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, DQ, LIEC, NANOFAEL, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of Applied Electrochemistry; v. 39, n. 1, p. 117-121, JAN 2009.
Web of Science Citations: 8
Abstract

Electrochemical decolourisation of Reactive Orange 16 was carried out in an electrochemical flow-cell, using as working electrodes a Pt thin film deposited on a Ti substrate (Pt/Ti) prepared by the Pechini method and a pure platinum (Pt) foil. Using the Pt/Ti electrodes better results for dye decolourisation were obtained under milder conditions than those used for pure Pt. For the Pt electrode, colour removal of 93 % (lambda = 493 nm) was obtained after 60 min, at 2.2 V vs. RHE, using 0.017 mol L(-1) NaCl + 0.5 mol L(-1) H(2)SO(4) solution. For the Pt/Ti electrode there was better colour removal, 98%, than for the Pt electrode. Moreover, we used 0.017 mol L(-1) NaCl solution and the applied potential was 1.8 V. Under this condition after 15 min of electrolysis, more than 80% of colour was removed. The rate reaction constant, assuming a first order reaction, was 0.024 min(-1) and 0.069 min(-1), for Pt and Pt/Ti electrodes, respectively. (AU)

FAPESP's process: 03/09933-8 - Center for Excellence in Electrochemically Synthesized Nanostructures
Grantee:Ernesto Chaves Pereira de Souza
Support Opportunities: PRONEX Research - Thematic Grants