Design of ternary Al-Sn-Fe alloy for fast on-board hydrogen production, and its application to PEM fuel cell

Title
Design of ternary Al-Sn-Fe alloy for fast on-board hydrogen production, and its application to PEM fuel cell
Authors
엄광섭김민중오세권조은애권혁상
Keywords
Aluminum; Al?n?e alloy; Hydrogen generation; Hydrolysis; On-board hydrogen production; PEMFC
Issue Date
2011-09
Publisher
International journal of hydrogen energy
Citation
VOL 36, NO 18, 11825-11831
Abstract
An Al–Sn–Fe alloy is designed to increase the hydrogen generation rate even in weak alkaline water through the effective removal of Al oxide. Al-1wt.%Sn-1wt.%Fe alloy exhibits the hydrogen generation rate about 6 times higher than pure Al and 1.6 times higher than Al-1wt.%Fe alloy. Increases in exchange current density of Al alloys are in good accordance with increases in hydrogen generation rate. The addition of Sn in Al–Fe alloy can increase the hydrolysis rate by accelerating the breakdown of passive film (Al(OH)3 and Al2O3) in an alkaline solution. Hence, the Al-1wt.%Sn-1wt%Fe alloy shows a much higher hydrogen generation rate than pure Al and Al-1wt.%Fe alloy in relatively weak alkaline water. In the hydrolysis of Al-1wt.%Sn-1wt%Fe, Fe accelerates the hydrogenproduction by inducing simultaneously both inter-granular and galvanic corrosion, whereas Sn increases the hydrogen generation rate by breaking the Al oxide down effectively. Based on the increase in the hydrogen generation rate of Al-1wt.%Fe and Al-1wt.%Sn-1wt%Fe alloys over pure Al, the contribution to the increase of Fe and Sn are calculated to be 63% and 27%, respectively. Because the same amount of power is obtained by PEMFC using 6 times less Al–Sn–Fe alloy than pure Al, the weight and volume of on-boardhydrogenproduction reactor can be reduced significantly by alloying Al with a small amount of Fe and Sn.
URI
http://pubs.kist.re.kr/handle/201004/40058
ISSN
0360-3199
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE