Hydrogen Fuel Cell (PEM)

2H2 + O2 → 2H2O

Visão geral

In a proton exchange membrane (PEM) fuel cell, hydrogen is oxidized at the anode and oxygen is reduced at the cathode, separated by a Nafion membrane. Protons pass through the membrane while electrons flow through an external circuit, producing electricity, water, and heat. Efficiency is 40–60%, roughly double that of combustion engines.

Participantes

Papel Substância Coeficiente Estado
Produto Water H₂O 2 (l)

Exemplo do cotidiano

Toyota Mirai and Hyundai Nexo are hydrogen fuel cell cars that emit only water vapor from their tailpipes.

Importância industrial

As células de combustível alimentam autocarros, empilhadoras, fontes de alimentação de emergência de centros de dados e submarinos. O mercado global de células de combustível ultrapassa os 5 mil milhões de euros anuais, impulsionado pela mobilidade a hidrogénio e pelos objetivos de neutralidade carbónica.

Propriedades

Tipo
Electrochemical
Reversível
Sim
Energia
Exotérmico
ΔH
-572,0 kJ/mol
Catalisador
Platinum on carbon

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Frequently Asked Questions

What is the equation for Hydrogen Fuel Cell (PEM)?
The balanced equation is: 2H₂ + O₂ → 2H₂O.
What type of reaction is Hydrogen Fuel Cell (PEM)?
Hydrogen Fuel Cell (PEM) is a electrochemical reaction. It is reversible under certain conditions.
Is Hydrogen Fuel Cell (PEM) exothermic or endothermic?
Hydrogen Fuel Cell (PEM) is exothermic (releases energy). The enthalpy change (ΔH) is -572.0 kJ/mol.
What conditions are needed for Hydrogen Fuel Cell (PEM)?
This reaction requires a catalyst (Platinum on carbon).