How electricity is generated

· When hydrogen is delivered to the hydrogen electrode it is ionized by a catalytic reaction with the platinum electrode, emitting electrons.
· After emitting electrons, the hydrogen ions pass through an electrolytic membrane (ion exchange membrane), where they bond with oxygen ions from oxygen delivered to the oxygen electrode (+) and the previously emitted electrons arriving via an external circuit.
· This reaction creates a DC electrical current, generating electricity. Water is generated at the oxygen electrode as a byproduct, and some of this water is used for humidification.
Electrical generation in the fuel cell stack

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1. How electricity is generated
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