An experimental comparison of a graphite electrode and a gas diffusion electrode for the cathodic production of hydrogen peroxide |
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Authors: | Anna Da?Pozzo Luca Di?Palma Carlo?Merli Email author" target="_blank">Elisabetta?PetrucciEmail author |
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Affiliation: | (1) Dipartimento di Ingegneria Chimica, dei Materiali, delle Materie Prime e Metallurgia, Università di Roma La Sapienza, Via Eudossiana 18, 00184 Roma, Italy |
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Abstract: | This work studies the production of hydrogen peroxide through the cathodic reduction of oxygen in acidic medium, by comparing the results obtained using a commercial graphite and a gas diffusion electrode. A low pH was required to allow the application of hydrogen peroxide generation to an electro-Fenton process. The influence of applied potential and the gas flow composition were investigated. The gas diffusion electrode demonstrates a higher selectivity for hydrogen peroxide production, without significantly compromising the iron regeneration, thus making its successful application to a cathodic Fenton-like treatment, possible. Unlike the graphite cathode, the gas diffusion cathode also proved to be effective in the air flow. |
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Keywords: | Fentons oxidation" target="_blank">gif" alt="rsquo" align="BASELINE" BORDER="0">s oxidation gas diffusion electrode graphite electrode hydrogen peroxide hydroxyl radical |
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