聚合物电解质膜电解
电力转天然气
电解
电解水
质子交换膜燃料电池
制氢
高压电解
过电位
高温电解
可再生能源
材料科学
电解质
电解法
氢经济
氢
化学工程
工艺工程
电化学
化学
工程类
电极
电气工程
有机化学
物理化学
燃料电池
作者
A.S. Aricò,Vincenzo Baglio,Nicola Briguglio,G. Maggio,S. Siracusano
标识
DOI:10.1002/9783527693924.ch34
摘要
Proton exchange membrane (PEM) water electrolysis is considered one of the most promising technologies to produce hydrogen with a high degree of purity from renewable energy resources such as wind, photovoltaic, and hydropower. The process is characterized by high efficiencies and elevated current densities at moderate temperatures. Compressed hydrogen can be directly obtained from the electrolyzer at an increased level of safety. However, PEM water electrolysis systems are characterized by high cost, which is mainly due to the use of noble metal catalysts, perfluorinated membranes, and titanium bipolar plates. Challenging aspects include dealing with the overpotential for the oxygen evolution process, and the ohmic contribution of the polymer electrolyte membrane resistance at high current densities. In addition, mechanical, chemical, and electrochemical stability play an important role. The aim of the present chapter is to review the status of PEM electrolysis and to make a comparison with competing technologies. The main perspective for these systems is a suitable integration with renewable power sources for decentralized hydrogen production.
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