Electrolysis of Water

2H₂O → 2H₂ + O₂

Обзор

An electric current passed through water splits it into hydrogen gas at the cathode and oxygen gas at the anode. The minimum voltage required is 1.23 V (thermodynamic), but practical electrolyzers operate at 1.8–2.0 V due to overpotential. A small amount of electrolyte (acid, base, or salt) is needed to make water conductive.

Участники

Роль	Вещество	Коэффициент	Состояние
Реагент	Water H₂O	2	(l)

Пример из жизни

Green hydrogen production uses renewable electricity to electrolyze water, producing clean fuel for vehicles and industry.

Промышленное значение

Water electrolysis produces about 4% of the world's hydrogen. Green hydrogen from electrolysis is projected to reach $1.5/kg by 2030.

Свойства

Тип: Electrochemical
Обратимая: Да
Энергия: Эндотермическая
ΔH: 572,0 kJ/mol

Связанные реакции

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 Sodium-Sulfur Battery Electrochemical CO₂ Reduction to CO

Frequently Asked Questions

What is the equation for Electrolysis of Water?

The balanced equation is: 2H₂O → 2H₂ + O₂.

What type of reaction is Electrolysis of Water?

Electrolysis of Water is a electrochemical reaction. It is reversible under certain conditions.

Is Electrolysis of Water exothermic or endothermic?

Electrolysis of Water is endothermic (absorbs energy). The enthalpy change (ΔH) is 572.0 kJ/mol.