On-board hydrogen production by hydrolysis from designed Al-Cu alloys and the application of this technology to polymer electrolyte membrane fuel cells

Title
On-board hydrogen production by hydrolysis from designed Al-Cu alloys and the application of this technology to polymer electrolyte membrane fuel cells
Authors
김민중엄광섭권재영조은애권혁상
Keywords
PEMFC; Hydrolysis; Aluminum copper alloy; On-board hydrogen production; Galvanic corrosion; Intergranular corrosion; Polymer electrolyte membrane fuel cells
Issue Date
2012-11
Publisher
Journal of power sources
Citation
VOL 217, 345-350
Abstract
Al–Cu alloys containing various amounts of Cu (2–5 wt.%) are designed to increase the hydrogen production rate in an alkaline solution by precipitating the electrochemically noble Al2Cu phase along the grain boundary. All of the Al–Cu alloys exhibit a microstructure with Al2Cu precipitates, which is electrochemically noble to Al in an alkaline solution, along the grain boundary. The hydrogen generation rate of Al–Cu alloys increases as the amount of Cu increases, and the Al- 5 wt.% Cu alloy exhibits a 4.7 times greater hydrogen generation rate than that of pure Al. This significant increase in hydrogen generation is affected by the combined action of galvanic corrosion and intergranular corrosion. When hydrogen produced by the hydrolysis of Al–Cu alloys is directly fed to a polymer electrolyte membrane fuel cell (PEMFC) anode, the cell voltage exhibits a stable value of approximately 0.73 V without a humidifier.
URI
http://pubs.kist.re.kr/handle/201004/42740
ISSN
03787753
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KIST Publication > Article
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