关键词: 研究了一种以空气为原料的电化学氧提取方法．该氧提取分离系统以泡花镍为阳极, 碳－聚四氟乙烯空气电极为阴极, KOH 溶液为电解液．利用常规的滴定分析方法测定了电解液中各种离子的浓度?并利用气相色谱测定了电解气中的氧气纯度（体积分数）．实验结果表明, 生产每公斤氧气的耗电量为1. 56～1. 86kW·h, 电解气中的氧气含量（体积分数）可达99．8％以上, 反应主要以阴极消耗空气中的氧气生成 OH^- 和 HO₂^- , 阳极OH^-和 HO₂^-又结合放出纯氧气为主．

Abstract: A new method of electrochemical extraction of oxygen from air was studied in this paper．The extraction system consists of undivided cells with a nickel anode, a carbon-polyterfluoroethylene air-fed cathode and KOH solution as electrolyte．The concentrations of ions in electrolyte were measured by normal analysis method, and the content of oxygen in electrolysis gas was measured by gas chromatography．The experimental results show that the energy consumption to extract 1 kg oxygen is 1. 56～1. 86kW·h．The volume fractiom of oxygen in electrolysis gas is99．8％ above．The cells reaction mainly is that OH^- and HO₂^- ions are electrogenerated at cathode and are also anodically decomposed to release oxygen at anode．

Key words: electrochemistry, oxygen extraction, principle