A Printed Electrocatalyst for Hydrogen Peroxide Reduction

The modification of silver screen-printed electrodes with a dodecyl benzenesulfonic acid and KCl solution was performed by inkjet printing. Scanning Electron Microscopy was performed to characterize the electrode surfaces. Electrochemical reduction of H ₂O ₂ was studied and compared to electrodes modified by dip-coating. Analytical parameters of the all-printed electrode such as LOD, sensitivity and inter-electrode reproducibility were calculated (5.8×10 ^-6M, 4.9×10 ^-2AM ^-1cm ^-2 and approx. 10%) and contrasted with other data in the literature for the measurement of H ₂O ₂. Ink jet printing led to reductions in required surface modification times and improved signal to background levels and reproducibility.