Fig. 3: ECL generation driven by streaming potential.
a Photograph of the streaming potential-driven ECL device with the quartz chamber and the PMT used as a light detector. The phenolic resin monolith was tightly filled inside the PEEK tube. b Schematic illustration of the device: the two electrodes were connected with an ammeter (A letter) to form a split BPE system to drive redox reactions. BTD-TPA was dip-coated onto the upstream electrode (anode). c A typical ECL emission profile generated during the flow of a MeCN/H2O (3:1 v/v) solution containing 5 mM TPrA with 0.5 mM Bu4NPF6 (red line), or without supporting electrolyte (blue line), at the flow rate of 0.30 mL min−1. Pumping of the solution started 60 s after the PMT was activated. d ECL emission profiles using an electrolyte-free MeCN/H2O (3:1 v/v) solution containing different concentrations of TPrA. Phenolic resin monolith no. 1 was employed as the filling material in all these experiments.
