电解
无机化学
化学
碱性水电解
阴极
电解质
阳极
碱金属
氢氧化钾
聚合物电解质膜电解
氢氧化物
电解槽
膜
电解水
离子交换
高温电解
离子
电极
生物化学
有机化学
物理化学
作者
Habin Park,Paul A. Kohl
标识
DOI:10.1016/j.jpowsour.2023.233643
摘要
Low-temperature hydrogen generation using anion exchange membranes electrolysis (AEMEL) uses the advantages of liquid water alkaline electrolysis and proton exchange membrane electrolysis. In this study, liquid water was fed to the anode and the cathode was operated dry. During electrolysis, water diffuses to the hydrogen cathode through the AEM. It was found that the supporting electrolyte in the water-fed anode (i.e., anolyte) plays an important role in the performance of the dry cathode. Alkali cations from the hydroxide-containing anolyte permeate into the membrane and migrate to the cathode during electrolysis delivering water and significantly improving cathode conductivity and kinetics. The alkali ions in the anolyte can be from an inert salt, not hydroxide, which lessen the potential degradation of cell components because the pH is not as high. There is an optimum concentration of neutral alkali salt in the anolyte because the non-electroactive anions in the anolyte lower the concentration of the hydroxide reactant in the anode ionomer.
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