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

作者：Li Qian; Henstridge Martin C; Batchelor McAuley Christopher; Lawrence Nathan S; Hartshorne Robert S; Compton Richard G^*

来源：Physical Chemistry Chemical Physics, 2013, 15(20): 7854-7865.

DOI：10.1039/c3cp50964h

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.

• 出版日期2013