Why do hydroxyl ions migrate towards the anode in a Bacon Cell?

Why do hydroxyl ions in a Bacon cell migrate towards the anode? Is it because of the relative concentration of the different ions in the set-up? According to the set-up of the bacon cell, the anode is negatively charged, thus would actually repel the incoming negative hydroxyl ions, but does not seem to do so. Please let me know if any further details are required.


I read on a wikipedia link explaining cathodes that this kind of migration (i.e negative ions towards a negative electrode) is in fact typical of discharging cells, chemical energy being the driving force behind this sort of "uphill" motion. Could someone please elaborate on this?


[![Image of a Bacon Cell attached](https://i.stack.imgur.com/LtqDR.jpg)](https://i.stack.imgur.com/LtqDR.jpg)


