Hydrogen Fuel Cell (PEM)

2H₂ + O₂ → 2H₂O

Tổng quan

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.

Người tham gia

Vai trò	Chất	Hệ số	Trạng thái
Sản phẩm	Water H₂O	2	(l)

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

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

Tính chất

Loại: Electrochemical
Thuận nghịch: Có
Năng lượng: Tỏa nhiệt
ΔH: -572,0 kJ/mol
Chất xúc tác: 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).