Precise design of a three-interface catalyst layer by quantum beam technology for polymer electrolyte membrane fuel cells

点击翻译按钮获取中文摘要

Under high-energy irradiation, the metal ions in aqueous solution were reduced to metal particles due to the high reduction ability of the generated hydrated electron and proton radicals from water. Furthermore, by addition of small amount of isopropanol to trap the hydroxyl peroxide radicals, the reduction ability of the metal ions could be largely enhanced. In this work, a mixture of platinic complexes, polymer electrolyte solution, carbon supports and isopropanol was irradiated by gamma rays, resulting in an ink-like mixture containing the reduced Pt particles loaded on the carbon supports. A simple method was established by coating the ink-like mixture onto a gas diffusion layer. In addition, by addition of carbon nanotube as part of the carbon supports, the catalyst ability was further enhanced, and a high maximum energy density of 0.6 W/cm^2 was reached with an ultra-low platinum loading of about 0.1 mg/cm^2.