Sorry Moo, a couple of fellow Bees built the apparatus. I didn't build or design the apparatus myself, I didn't own it, and it was a long time ago.
It was copied from a design reported in literature. It was about the size of a car battery, and contained a series of flat metal plates. I don't remember a lot more about it.
It wasn't working well, there was talk of needing a $1,000 power supply, and It's ~15% yields, were disheartening. As I recall, there was also, gas build up on the electrodes, which interfered with performance....a problem which Sam's patent's, rotating electrode with wiper might help solve.
I was involved with this project for reasons other than genius at electrochemistry. I had other talents.
Anyway, reducing agents were readily available at that time, and there were more rewarding projects awaiting.
Electroreduction would have been nice, but it was a sticky problem.
I'm afraid you need someone who is well versed in this arcane craft, and has successfully practiced electroreduction. Wish I could be more helpful, but I'm not the guy.
I wish you well .........................zed
P.S. We would have been happy to accept longer reaction times. But, longer reaction times did not seem to help yields. We concluded that if we overcame other problems, we would still need a huge power supply, to provide the current density needed. Further, even the literature reported yields, for the ring substituted phenethylamines that we were interested in, were modest.
Were I to take on such a project, I would try to make sure there was some payoff, even if things went poorly.
I used to find a co-operative chemistry/physics professor, create my own independent studies course, use free college equiptment, and reagents, get college credits, and collect every cent of student grant money I could.
I then restricted myself to legal projects, that might have other applications. My projects usually failed, but my grades were good, it didn't cost me much, and the only stress involved was in trying to accomplish the impossible.
It is quite possible, none of this applies to you, but I guess my point is, this might be a pretty demanding project.