화학공학소재연구정보센터
International Journal of Hydrogen Energy, Vol.43, No.9, 4265-4275, 2018
Hydrogen production by a low-cost electrolyzer developed through the combination of alkaline water electrolysis and solar energy use
Electrolysis is a relatively simple process for obtaining hydrogen and can be combined with use of renewable energy sources, such as solar photovoltaic energy, for clean, sustainable gas production. This study designed a cylindrical electrolytic cell made of acrylic and 304 stainless steel electrodes to produce hydrogen. The electrolyte used was sodium hydroxide (NaOH 2-5 mol L-1), and the direct current voltages applied were 2.0, 2.7, and 3.4 V. The maximum hydrogen production was achieved with 5.0 mol L-1 NaOH and 3.4 V electric voltage. The system was connected to a photovoltaic panel of 20 W and exposed to solar radiation from 10 a.m. to 2 p.m. Approximately 2 L of hydrogen was produced within a period, and an average irradiance of 800.0 W m(-2) +/- 60 W m(-2) was achieved. The system was stable throughout the tests. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.