https://scholars.lib.ntu.edu.tw/handle/123456789/451106
標題: | A novel micro protective layer applied on a simplified PEM water electrolyser | 作者: | Sung, C.-C. Liu, C.-Y. CHIA-CHI SUNG |
關鍵字: | Hydrogen production; Micro protective layer; Proton exchange membrane; Water electrolyser | 公開日期: | 2013 | 卷: | 38 | 期: | 24 | 起(迄)頁: | 10063-10067 | 來源出版物: | International Journal of Hydrogen Energy | 摘要: | This study presents a solid polymer electrolyte (SPE) technique, using a proton exchange membrane (PEM) water electrolyser, to produce high purity hydrogen and oxygen (both 99.99%). A proposed structural design provides comprehensive sealing of the assembly while combining a current collector and a flow field plate into a single component. The titanium porous disc with a highly condensed structure compared to the carbon based gas diffusion layer plays a key role as the support for the proton exchange membrane when producing high-pressure hydrogen. The electrochemical stability is enhanced as well owing to the consolidated component. The titanium porous disc is coated with noble metal catalysts (IrO2/Ta2O5 composition) as a micro protective layer (MPL) to prevent corrosion and oxidation during hydrogen production from water electrolysis. The proposed MPL can effectively transform active oxygen species (such as oxygen atoms and hydroxyl free radicals) into harmless oxygen gas during water electrolysis. In this study, it is found that the electrolytic cell can sustain up to 10 bar and its lifetime is capable of lasting over 600 h continuously while maintaining a voltage of 2.33 to 2.35 V and current density of 1 A cm-2. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/451106 | DOI: | 10.1016/j.ijhydene.2013.06.034 | SDG/關鍵字: | Corrosion and oxidation; Electrochemical stabilities; Hydroxyl free radicals; Protective layers; Proton exchange membranes; Proton-exchange membrane; Solid polymer electrolytes; Water electrolyser; Free radicals; Hydrogen production; Ionization of gases; Oxygen; Proton exchange membrane fuel cells (PEMFC); Structural design; Tantalum oxides; Titanium; Hydrogen |
顯示於: | 工程科學及海洋工程學系 |
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