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When hydrogen is delivered to the hydrogen electrode it is ionized by a catalytic reaction with the platinum electrode, emitting electrons. |
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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. |
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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. |
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| Electrical generation in the fuel cell stack |
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