Hydrogen Fuel Cell (PEM)

2H2 + O2 → 2H2O

概述

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.

参与者

角色 物质 系数 状态
产物 Water H₂O 2 (l)

日常示例

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

工业重要性

燃料电池为公交车、叉车、数据中心备用电源和潜艇提供动力，全球燃料电池市场规模已超过50亿美元，年增速超过20%。

属性

类型
Electrochemical
可逆
是
能量
放热
ΔH
-572.0 kJ/mol
催化剂
Platinum on carbon

相关反应

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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).