Zr-based AB(2)-type hydrogen storage alloys as dual catalysts of gas-diffusion electrodes in an alkaline fuel cell
2004 (English)In: Journal of Physical Chemistry B, ISSN 1520-6106, E-ISSN 1520-5207, Vol. 108, no 26, 8756-8758 p.Article in journal (Refereed) Published
Zr-based AB(2)-type hydrogen storage alloys as dual catalysts for hydrogen adsorption and oxidation reactions in alkaline fuel cells were investigated. A hydrogen-diffusion electrode composed of this hydride alloy was constructed, and its performance in terms of catalytic activities and durability was evaluated. Results demonstrated that the hydrogen-diffusion electrode had not only good activity but also excellent stability at a current density of 40-60 mA/cm(2) after surface treatments using a 1.0 M HF solution. XPS analyses showed that the improvement in catalytic activity is related to the formation of a nickel-rich layer and the removal of other oxides on the catalyst surface. The novel possible application of Zr-based hydride alloys could lead to an attempt to exploit new catalysts to lower material cost for hydrogen fuel cells.
Place, publisher, year, edition, pages
2004. Vol. 108, no 26, 8756-8758 p.
amorphous ni-zr, activation, hydrides, anodes, needs
IdentifiersURN: urn:nbn:se:kth:diva-23540DOI: 10.1021/jp0486548ISI: 000222279100002ScopusID: 2-s2.0-3142764813OAI: oai:DiVA.org:kth-23540DiVA: diva2:342238
QC 20100525 QC 201111012010-08-102010-08-102011-11-01Bibliographically approved