Nanoporous gold anode catalyst for direct borohydride fuel cell

Publication type: 
Peer-reviewed journal article
Authors(Internal): 
All authors: 
Lorraine Nagle, James Rohan
Theme: 
Microsystems
Abstract: 
Nanoporous gold (NPG) electrodes were fabricated in film and wire array formats by selectively dealloying Ag from Au0.18Ag0.82. Borohydride oxidation was studied by cyclic voltammetry at the NPG electrodes. The onset potential for the oxidation at a NPG wire array shifted to more negative potentials that than observed at a Au disc and higher currents were realised. An onset potential of -1.07 V vs. Ag/AgCl which is 0.207 V lower than that at a Au disc was recorded. The oxidation current for 20 mM borohydride in 1 M NaOH increased to 73.6 mA cm-2 from 3.17 at a Au disc. A value of 7.85 electrons was determined for n out of a possible 8 for borohydride oxidation. NPG presents an attractive alternative to gold nanoparticle-based catalysts for use in direct borohydride fuel cells. NPG can establish intimate contact with an electrical substrate and eliminates the need for a carbon support.
Date accepted: 
22/09/2010
Publication date: 
22/10/2010
Funder: 
EPA
Journal abbreviation: 
INT J HYDROGEN ENERG
Journal/Book title: 
International Journal of Hydrogen Energy
Publisher: 
Elsevier
Volume: 
36
Page start: 
10319
Page end: 
10326
Impact factor: 
4.407
Proceedings: 
None
Year: 
2013
Document Controller: 
Greg Herzog
Ireland fund ecsf ucc
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