Hydrogenation and voltaic pile: what they have in common

1. Step 1. Hydrogenation — uses — Hydrogen. Hydrogen.
2. Step 2. Hydrogen — uses — Electrolysis. Hydrogen is produced by electrolysis of water.
3. Step 3. Electrolysis — evolved from — Voltaic pile. The first electrolysis of water was powered by a voltaic pile.

Open Evothings