Hydrogen Fuel Cell (PEM)

2H2 + O2 → 2H2O

Descripción general

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

Rol Sustancia Coeficiente Estado
Producto Water H₂O 2 (l)

Ejemplo cotidiano

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

Importancia industrial

Las celdas de combustible alimentan autobuses, carretillas elevadoras, sistemas de respaldo para centros de datos y submarinos. Los ingresos globales del sector de celdas de combustible superan los 5000 millones de dólares.

Propiedades

Tipo
Electrochemical
Reversible
Sí
Energía
Exotérmico
ΔH
-572,0 kJ/mol
Catalizador
Platinum on carbon

Reacciones relacionadas

Electrolysis of Water Electrolytic Production of Chlorate Electrorefining of Copper Alkaline Battery Discharge Anodizing of Aluminum Cathodic Protection (Zinc Sacrificial Anode) Chlor-Alkali Electrolysis Chrome Electroplating Nickel-Metal Hydride Battery Electrochemical CO₂ Reduction to CO

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).