Electrolysis of Water

概述

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.

参与者

日常示例

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

工业重要性

水电解制氢是绿氢经济的基础。质子交换膜（PEM）电解槽和碱性电解槽是主流技术，全球绿氢产能正在快速扩张。