Figure 4
From: Reverse Electrodialysis-Assisted Solar Water Splitting

Overall water-splitting performance of the integrated PEC-RED system. A standalone PEC cell (blue). Integrated PEC-RED cells with 8 (orange) and 20 (red) membrane-pairs. With the RED stack, the current density-voltage curves shift in the positive direction. At the same time, the water-splitting reaction is initiated and the current density increases up to 23 mA cm−2 without any external bias.