Abstract
Water electrolysis is considered as the most capable and old technology for hydrogen fuel preparation. Electrolysis needs external electrical energy through electrodes to split water into hydrogen and oxygen. An efficient electrolysis requires suitable electrodes to minimize potential drop. In this study Aluminium and Copper Coated Aluminium were used as different combination of Anodes and Cathodes to find out more efficient electrodes combination. NaCl solution in rain water was taken as electrolyte. Rain water was taken to avoid ionic impedance of tap water and expenses of distilled water. In this study, the most efficient electrode combination was Copper Coated Aluminium (anode)-Aluminium (cathode) and gave the highest efficiency of hydrogen production to about 11% at normal temperature for very low concentration of NaCl (0.051 M) which increased with temperature, up to 29% upon rising of temp to 60°C. It was showed that higher concentration of electrolyte would surge the efficiency significantly. If the supplied heat could be provided from any waste heat sources then this study would be more efficient. However, current research evaluated the technical feasibility of this electrode combination for producing hydrogen with electrolysis of rain water utilizing electricity and modified electrodes.
Highlights
Hydrogen fuel is considered the cleanest alternative fuel to face world’s energy challenge which leads researchers to fulfill increasing global energy demand using more economical and environmentally-friendly ways [1]
In this study Aluminium and Copper Coated Aluminium were used as different combination of Anodes and Cathodes to find out more efficient electrodes combination
The most efficient electrode combination was Copper Coated Aluminium-Aluminium and gave the highest efficiency of hydrogen production to about 11% at normal temperature for very low concentration of NaCl (0.051 M) which increased with temperature, up to 29% upon rising of temp to 60 ̊C
Summary
Hydrogen fuel is considered the cleanest alternative fuel to face world’s energy challenge which leads researchers to fulfill increasing global energy demand using more economical and environmentally-friendly ways [1]. Hydrogen is an important source of sustainable energy system which can be a promising alternative energy for carbon-based fuel [2] [3]. Their alloys, oxides, and bi-metal coatings are being efficiently used as electrode constructing materials [11] [12] Most of these materials are very expensive and require high degree of purity (99.99%). Current study was intended to prepare a new suitable efficient electrode combination at minimum expense. The process based on the anodic dissolution of coated and uncoated aluminum combination [1] in alkaline-chloride solutions in rain water is one of the research areas that study the new ways of electrochemical hydrogen production along with its efficiency measurement [9]
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