title: Glassy carbon tubular electrodes for the reduction of oxygen to hydrogen peroxide.
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.
authors.affiliation: Department of Chemistry, Physical & Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX1 3QZ, UK.
authors.forename: Qian
authors.initials: Q
authors.lastname: Li
authors.forename: Martin C
authors.initials: MC
authors.lastname: Henstridge
authors.forename: Christopher
authors.initials: C
authors.lastname: Batchelor-McAuley
authors.forename: Nathan S
authors.initials: NS
authors.lastname: Lawrence
authors.forename: Robert S
authors.initials: RS
authors.lastname: Hartshorne
authors.forename: Richard G
authors.initials: RG
authors.lastname: Compton
mesh_terms: D004566:Electrodes; D005898:Glass / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry*
chemical_list: D037742:Nanotubes, Carbon; D006861:Hydrogen Peroxide; D010100:Oxygen