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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.)

In Situ Electrochemical Generation of Hydrogen Peroxide in Alkaline Aqueous Solution by using an Unmodified Gas Diffusion Electrode

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Author(s):
Barros, Willyam R. P. [1] ; Ereno, Thais [2] ; Tavares, Ana C. [1] ; Lanza, Marcos R. V. [2]
Total Authors: 4
Affiliation:
[1] INRS, EMT, Varennes, PQ J3X 1S2 - Canada
[2] Univ Sao Paulo, IQSC, BR-13566590 Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: CHEMELECTROCHEM; v. 2, n. 5, p. 714-719, MAY 13 2015.
Web of Science Citations: 36
Abstract

Hydrogen peroxide (H2O2) is an oxidizing agent commonly used for various applications and is available in aqueous solution in a wide range of concentrations. This work describes the H2O2 electrogeneration process in alkaline medium (KOH 1.0 mol L-1), using an unmodified gas diffusion electrode (GDE) manufactured with Printex 6L carbon. The experiments were performed in a single-compartment electrochemical cell equipped with a GDE as the working electrode, which was fed with N-2 or O-2 at a pressure of 0.2bar. Electrolysis experiments were performed at a constant potential (-0.5 <= E <=-1.4V) for 90min. The H2O2 concentration reached a maximum value of 3370mgL(-1) at -1.1V (vs. Ag/AgCl), and H2O2 electrogeneration followed pseudo-zero-order kinetics with an apparent rate constant k(app)=59.7mgL(-1) min(-1). A low energy consumption of 8.0 kWh kg(-1) was calculated for these electrogeneration conditions. (AU)

FAPESP's process: 11/00535-6 - Application of advanced oxidation processes (AOP) from in situ electrogeneration H2O2 for the degradation of food dyes
Grantee:Marcos Roberto de Vasconcelos Lanza
Support type: Regular Research Grants
FAPESP's process: 13/06682-6 - Synthesis and characterization of nanocatalysts in the application of gas diffusion electrodes for of hydrogen peroxide electrogeneration in situ
Grantee:Willyam Róger Padilha Barros
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 11/06681-4 - Application of advanced oxidation processes (AOP) from in situ electrogeneration H2O2 for the degradation of food dyes: amaranth, Tartrazine, Brilliant Blue FCF and fast green
Grantee:Willyam Róger Padilha Barros
Support type: Scholarships in Brazil - Doctorate