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Issue 20, 2013
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Glassy carbon tubular electrodes for the reduction of oxygen to hydrogen peroxide

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Abstract

The oxygen reduction reaction (ORR) to produce hydrogen peroxide (H2O2) is of great industrial interest. Herein, a hydrodynamic electrochemical method is explored for use as a continuous method to produce H2O2 at the point-of-use. The ORR was studied in a tubular glassy carbon flow cell under a laminar flow regime. A generalised theoretical model was developed to explore the conditions, such as volume flow rates and tubular lengths etc., for which a near-full electrolysis may be achieved. The parameters probed, transfer coefficient, half-wave potentials, volume flow rates, etc., provide physical insights into the irreversible oxygen reduction process. Thereafter, the surface modification of the tubular electrode with an electrocatalyst, 2-anthraquinonyl group (AQ-), is investigated for the mediated reduction of oxygen. This is shown to usefully decrease the required overpotential for the reduction process.

Graphical abstract: Glassy carbon tubular electrodes for the reduction of oxygen to hydrogen peroxide

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Publication details

The article was received on 04 Mar 2013, accepted on 10 Apr 2013 and first published on 11 Apr 2013


Article type: Paper
DOI: 10.1039/C3CP50964H
Citation: Phys. Chem. Chem. Phys., 2013,15, 7854-7865

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    Glassy carbon tubular electrodes for the reduction of oxygen to hydrogen peroxide

    Q. Li, M. C. Henstridge, C. Batchelor-McAuley, N. S. Lawrence, R. S. Hartshorne and R. G. Compton, Phys. Chem. Chem. Phys., 2013, 15, 7854
    DOI: 10.1039/C3CP50964H

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