A flow system for hydrogen peroxide production at reticulated vitreous carbon via electroreduction of oxygen

作者：Li Qian; Batchelor McAuley Christopher; Lawrence Nathan S; Hartshorne Robert S; Jones Charles J V; Compton Richard G^*

来源：Journal of Solid State Electrochemistry, 2014, 18(5): 1215-1221.

DOI：10.1007/s10008-013-2250-9

• Electrosynthesis of hydrogen peroxide
• Reticulated vitreous carbon
• Electrochemical oxygen reduction
• Hydrodynamic flow cell
• Anthraquinonyl surface modification

In this work, a reticulated vitreous carbon electrode (RVCE, 96.5 % porosity, 24 cm(-1)) was modified with 2-anthraquinonyl groups to electrocatalytically reduce dissolved oxygen in neutral aqueous solution (0.1 M phosphate buffer solution supported with 3 M potassium chloride, pH of 6.7) to hydrogen peroxide (H2O2) at 25 A degrees C under atmospheric pressure. The obtained current density was ca. 3 mA cm(-2). For the first time, the oxygen reduction was investigated on a novelly designed RVCE housed in a gravity-feed flow system. Fractional current conversions obtained on the RVC flow cell were compared and contrasted with those on a two-dimensional electrode, viz. a tubular flow electrode. The modified-on catalyst has the benefit in terms of easy separation of the product from the catalyst. The in situ generated low concentration of H2O2 provides potential applications to water purification processes and disinfection for water and food.

• 出版日期2014-5