That will have to be determined.
The closest "replication" of a hairpin circuit for producing hydroxy is Dave Lawton's "cold electricity" wfc replication. If you follow the flow it's similar to Karl Palsness' Tesla stout copper rod or hairpin circuit. The missing element according to Karl is mass. That's my take on it. Not what Karl said as regards to hydroxy generation but what I think. Watch the videos, re-read Tesla and experiment.
Regards,
Andy