Electrolysis of Water

2H2O → 2H2 + O2

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Water H₂O 2 (l)

일상 속 예시

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

산업적 중요성

재생에너지를 이용한 그린 수소 생산의 핵심 공정입니다. 수소 연료전지 차량 및 산업용 수소 공급에 활용되며, 탄소 중립 에너지 시스템 구축의 핵심 기술입니다.

성질

유형
Electrochemical
가역 반응
예
에너지
흡열
ΔH
572.0 kJ/mol

관련 반응

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.