some test results:
Hi guys,
Little steps i made.
The can is stainless 316
The alu is simple alu foil.
Water with KOH. I dont have naoh here, yet.
It created the usual hydrogen but also electrical power, as you suggested.
It is amazing.
The maximum i got out of this 1 can/ cell was 0,1v with 0,8A (measured under load)
Voltage 0,85v without load.
That makes a wopping 0,08w of produced power.
I need 1000 of these cells to get 80watts......

Smaller alu electrode reduces and bigger raises the power....
Here some pics i took during these simple tests.
I also tried a copper rod, but that didnt bring anything good, in anyways i tried.