I'm trying to produce a large amount of brown's gas, and I'm wondering if higher voltage or amperage will split the water faster.
The chemical yield in an electrolysis is proportional to the amperage. Increasing the voltage is no use. It will only increase the production of heat. But it is often necessary to increase the voltage to increase the amperage. A good way of increasing the amperage without increasing the voltage is to decrease the distance between the electrodes, and increasing the surfaces of the electrodes.