儿茶酚
海水淡化
电化学
制氢
化学
化学工程
氢
无机化学
废物管理
有机化学
电极
工程类
膜
生物化学
物理化学
作者
Na Hyeon Kim,Byeongkyu Kim,Yong Seok Kim,Anki Reddy Mule,Chan‐Hwa Chung
出处
期刊:Desalination
[Elsevier]
日期:2024-03-19
卷期号:580: 117541-117541
被引量:1
标识
DOI:10.1016/j.desal.2024.117541
摘要
Green hydrogen, commonly produced through water electrolysis, has attracted considerable attention owing to its energy-efficient and eco-friendly properties. However, since conventional water electrolysis system has fatal drawbacks owing to the high process cost and energy requirements, various approaches are being adopted to increase its energy efficiency. In this study, a novel hybrid system for green hydrogen production was designed by replacing the oxygen evolution reaction (OER) with electrochemical oxidation of catechol (CAT). CAT is an environmental pollutant generated by diverse industries and needs to be further treated because of its toxicity to humans and nature. Accordingly, to facilitate the degradation of CAT and increase the energy efficiency, the pH values of the anolyte (containing CAT) and catholyte were adjusted to alkali and acid, respectively. Two types of ion-exchange membranes (IEMs; anion-/cation-exchange membranes) were coupled to divide the hybrid cell into three compartments, and a buffer solution (NaCl solution) was injected between the IEMs. As a result, the hybrid system output 3.75 mW/cm2 of electricity, spontaneously produced hydrogen with 4.2 mL/h of hydrogen production rate and removed ions from the buffer solution with 0.46 mg/cm2∙min of high desalination rate.
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