Electrocatalytic Behavior of Mediators during Anodic Oxidation of Tartaric Acid at Platinum Electrodes

Author(s)

Martinez-Huitle, Carlos A. ^{[1, 2]} ; de Almeida, Camila Carvalho ^[1] ; Fajardo, Ana S. ^[1] ; Ferro, Sergio ^{[3, 4]} ; De Battisti, Achille ^[3]

Affiliation

^[1] Fed Univ Fed Rio Grande do Norte, Inst Chem, BR-59078970 Natal, RN - Brazil

^[2] UNESP, Natl Inst Alternat Technol Detect, Toxicol Evaluat & Removal Micropollutants & Radio, Inst Chem, BR-14800900 Araraquara, SP - Brazil

^[3] Univ Ferrara, Dipartimento Sci Chim & Farmaceut, I-44121 Ferrara - Italy

^[4] Ecas4 Australia Pty Ltd, Unit 8-1 London Rd, Mile End South, SA 5031 - Australia

• Document type: Journal article
• Source: Journal of the Electrochemical Society; v. 164, n. 13, p. E375-E378, 2017.
• Web of Science Citations: 1

Abstract

The effect of the nature and concentration of different halide salts (NaBr, NaCl and NaF) was followed by electrochemical measurements in an alkaline media. Based on the interesting results that were obtained, the electrochemical oxidation (EO) of tartaric acid (TA) with Pt electrodes was performed in the absence and presence of those substances, in order to verify their influence in indirect electrocatalytic mechanisms. A slow EO was observed in the absence of mediators. Conversely, with halide salts, the rate of the electrochemical incineration was significantly enhanced in the following order Cl- < Br- < F-. The rate of the mediated process was practically independent of applied current density (30 and 60 mA cm(-2)). Energy efficiency and energy consumption parameters were estimated, as well as the by-products were detected by GC/MS technique. (c) 2017 The Electrochemical Society. All rights reserved. (AU)

• FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
• Grantee: Maria Valnice Boldrin
• Support Opportunities: Research Projects - Thematic Grants