Their setup looks remarkably similar to my PhD work [0][1] (that included a PoC and simulation). We didn't do power generation, but there was significant electrical activity (nanoamps and millivolts per pore). If I remember right, even at the time there was ongoing research to use porous films to generate power from saltwater, but the ongoing issue was biofouling. Turns out it's really easy to clog a pore that is nanometer-scale.
