Hydrogen Fuel Cell (PEM)

2H2 + O2 → 2H2O

Übersicht

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.

Teilnehmer

Rolle Substanz Koeffizient Zustand
Produkt Water H₂O 2 (l)

Alltägliches Beispiel

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

Industrielle Bedeutung

Fuel cells power buses, forklifts, data center backup, and submarines. Global fuel cell revenue exceeds $5 billion and is growing rapidly.

Eigenschaften

Typ
Electrochemical
Reversibel
Ja
Energie
Exotherm
ΔH
-572,0 kJ/mol
Katalysator
Platinum on carbon

Verwandte Reaktionen

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).