Hydrogen Peroxide Production in an Electrochemical Flow-by Reactor using Gas Diffusion Electrodes Modified with Organic Redox Catalysts


  • Juliane Forti a:1:{s:5:"en_US";s:106:"São Paulo State University (UNESP), School of Sciences and Engineering, Biosystems Engineering Department";}
  • Mariana Matulovic São Paulo State University (UNESP), School of Sciences and Engineering, Biosystems Engineering Department
  • Mario Mollo Neto São Paulo State University (UNESP), School of Sciences and Engineering, Biosystems Engineering Department
  • Felipe Santos São Paulo State University (UNESP), School of Sciences and Engineering, Biosystems Engineering Department
  • Marcos Lanza University of São Paulo (USP), São Carlos Institute of Chemistry
  • Rodnei Bertazzoli Campinas State University (UNICAMP)




electrochemical flow-by reactor, hydrogen peroxide, gas diffusion electrodes, organic redox catalysts, fuzzy logic decision support


This paper presents a proposal to use an electrochemical flow-by reactor for hydrogen peroxide electrogeneration using cathodes formed from the incorporation of organic redox catalysts (2-ethylanthraquinone, 2-tert-butylanthraquinone, alizarin, and azobenzene) in the structure of gas diffusion electrodes. These electrodes help circumvent the low solubility of oxygen in aqueous solutions. Organic redox catalysts, which typically contain quinone or azo groups in their structure, were added to the electrode mass in a 10% proportion. The electrodes were used to study the electrogeneration of hydrogen peroxide in situ, in an acid medium (0.1 mol L-1 H2SO4 and 0.1 mol L-1 K2SO4, pH 1), inside an electrochemical flow-by reactor. Comparative analysis among the different catalysts indicated that the best electrode for hydrogen peroxide electrogeneration was the gas diffusion electrode modified with 10% of 2-ethylanthraquinone. With an underflow rate of 200 L h-1, hydrogen peroxide was formed with a maximum yield of 998.12 mg L-1 after 2 h at -2.0 V vs Pt//Ag/AgCl, for which the energy consumption was 11.21 kWh kg-1. The use of the electrochemical flow-by reactor was much more efficient, in that it yielded higher concentrations of hydrogen peroxide with extremely low energy consumption, compared to that obtained when using an electrochemical cell. In addition, for ensuring appropriate usage of the electrodes, optimizing their potential for the maximum generation of hydrogen peroxide, and obtaining the highest efficiency for the reduction of oxygen, a fuzzy algorithm was developed to help support the user’s decision.


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Author Biography

Rodnei Bertazzoli, Campinas State University (UNICAMP)

Materials Engineering Department, 13083-970, Campinas, SP, Brazil


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How to Cite

Forti, J., Matulovic, M., Mollo Neto, M., Santos, F., Lanza, M., & Bertazzoli, R. . (2020). Hydrogen Peroxide Production in an Electrochemical Flow-by Reactor using Gas Diffusion Electrodes Modified with Organic Redox Catalysts. International Journal for Innovation Education and Research, 8(7), 152–170. https://doi.org/10.31686/ijier.vol8.iss7.2463

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