首页 | 本学科首页   官方微博 | 高级检索  
     


Hydrogen from electrochemical reforming of C1–C3 alcohols using proton conducting membranes
Authors:FM Sapountzi  MN Tsampas  HOA Fredriksson  JM Gracia  JW Niemantsverdriet
Affiliation:1. SynCat@DIFFER, Syngaschem BV, P.O. Box 6336, 5600 HH, Eindhoven, The Netherlands;2. FOM Institute DIFFER, Dutch Institute for Fundamental Energy Research, De Zaale 20, 5612 AJ, Eindhoven, The Netherlands;3. SynCat@Beijing, Synfuels China Technology Co. Ltd, 1 Leyuan 2 South Street, Section C, Yanqi Economic Development Area, Beijing, 101407, China
Abstract:This study investigates the production of hydrogen from the electrochemical reforming of short-chain alcohols (methanol, ethanol, iso-propanol) and their mixtures. High surface gas diffusion Pt/C electrodes were interfaced to a Nafion polymeric membrane. The assembly separated the two chambers of an electrochemical reactor, which were filled with anolyte (alcohol + H2O or alcohol + H2SO4) and catholyte (H2SO4) aqueous solutions. The half-reactions, which take place upon polarization, are the alcohol electrooxidation and the hydrogen evolution reaction at the anode and cathode, respectively. A standard Ag/AgCl reference electrode was introduced for monitoring the individual anodic and cathodic overpotentials. Our results show that roughly 75% of the total potential losses are due to sluggish kinetics of the alcohol electrooxidation reaction. Anodic overpotential becomes larger as the number of C-atoms in the alcohol increases, while a slight dependence on the pH was observed upon changing the acidity of the anolyte solution. In the case of alcohol mixtures, it is the largest alcohol that dictates the overall cell performance.
Keywords:Alcohol electrolysis  Electrochemical reforming  Hydrogen production  Gas diffusion electrodes  Polymeric proton conductor
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号