Design and Operation of a Solar Electrolysis System
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Author/Creator ORCID
Date
2022-09-29
Type of Work
Department
Program
Citation of Original Publication
Weiner, Matthew et al. "Design and Operation of a Solar Electrolysis System." Adelphi, MD: DEVCOM Army Research Laboratory, 2022.
Rights
This is a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
Public Domain Mark 1.0
Public Domain Mark 1.0
Subjects
Abstract
A system connecting a commercial photovoltaic panel to a water electrolysis cell is designed as a demonstrator project for
converting solar energy into hydrogen as a fuel. The electrical design is specifically tuned to drive a specified voltage to the
electrolysis cell through control of buck converters and monitored through directly mounted voltmeters and ammeters. The
electrolysis cell is designed in a H-cell configuration to contain the electrolyte. Gas collection bags are mounted on the
electrodes to collect hydrogen gas evolved from water electrolysis. The components are constructed and mounted such that
outdoor operation could be conducted without environmental damage to critical components. The synthesized electrocatalysts
(undoped and iron-doped cobalt phosphide on nickel foam) are characterized with linear sweep voltammetry, cyclic
voltammetry, and impedance spectroscopy to evaluate their performance. The electrodes are subsequently mounted within the
electrolysis cell with potassium hydroxide electrolyte, and the entire photovoltaic panel/electronics/electrolysis cell system is
tested outdoors to evaluate performance under a variety of environmental conditions. System performance is evaluated
through calculations of Faradaic efficiency and energy conversion efficiency through the collection of hydrogen gas.