Honestly, that is indistinguishable from the crystal mumbojumbo you get. And it feels like we're at the magic/science interface with electrotherapy.
That said it is somewhat suspect, and the hypothesis is not really falsifiable by the experiment which is why the journal article itself is not claiming to test that. It is really disappointing that IEEE didn't actually link to or name the article directly. Very poor science journalism there.
The article is that they observed this process working, not why it works. Maybe it works because it kills bacteria...?