Standard kilogram and voltaic pile: what they have in common

1. Step 1. Standard kilogram — is made of — Platinum. A platinum–iridium alloy.
2. Step 2. Platinum — is material for — Fuel cell. A platinum catalyst.
3. Step 3. Fuel cell — uses — Electrochemical reaction. The reaction runs electrochemically, without combustion.
4. Step 4. Electrochemical reaction — is used in — Voltaic pile. Current arises from the reaction of dissimilar metals with an electrolyte.

Open Evothings