期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 36, 期 5, 页码 3333-3339出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2010.12.044
关键词
PEM electrolyzer; Stack; Hydrogen production; Water electrolysis; IrO2 catalyst; Oxygen evolution reaction
An optimization study of components and assembling characteristics for a proton exchange membrane (PEM) short stack electrolyzer (3 cells of 100 cm(2) geometrical area) was carried out. The electrochemical properties were investigated by polarization, impedance spectroscopy and chrono-potentiometric measurements. A decrease of the ohmic contact resistance between the bipolar plates and the electrode backing layer was obtained by using an appropriate thickness for the gas diffusion layers/current collectors as well as by an optimization of stack compression. The amount of H-2 produced was similar to 90 1 H-1 at 60 A (600 mA cm(-2)) and 75 degrees C under 300 W of applied electrical power. No significant leakage or gas recombination was observed. The stack electrical efficiency was 75% and 88%, at 60 A and 75 degrees C, with respect to the low and high heating value of hydrogen, respectively. Copyright (C) 2010, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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