dc.contributor.author |
Tran, Anh |
en |
dc.contributor.author |
Duke, MC |
en |
dc.contributor.author |
Gray, PG |
en |
dc.contributor.author |
Diniz da Costa, JC |
en |
dc.contributor.editor |
Gao, Wei |
en |
dc.contributor.editor |
Hodgson, MA |
en |
dc.contributor.editor |
Ferguson, WG |
en |
dc.contributor.editor |
Suh, CM |
en |
dc.contributor.editor |
Murakami, R |
en |
dc.date.accessioned |
2012-03-30T01:38:08Z |
en |
dc.date.issued |
2006 |
en |
dc.identifier.citation |
International Journal of Modern Physics B 20(25-27):4147-4152 2006 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/16159 |
en |
dc.description.abstract |
Titanium phosphate is currently a promising material for proton exchange membrane fuel cells applications (PEMFC) allowing for operation at high temperature conditions. In this work, titanium phosphate was synthesized from tetra iso-propoxide (TTIP) and orthophosphoric acid (H3PO4) in different ratios by a sol gel method. High BET surface areas of 271 m2.g-1 were obtained for equimolar Ti:P samples whilst reduced surface areas were observed by varying the molar ratio either way. Highest proton conductivity of 5.4×10-2 S.cm-1 was measured at 20°C and 93% relative humidity (RH). However, no correlation was observed between surface area and proton conductivity. High proton conductivity was directly attributed to hydrogen bonding in P-OH groups and the water molecules retained in the sample structure. The proton conductivity increased with relative humidity, indicating that the Grotthuss mechanism governed proton transport. Further, sample Ti/P with 1:9 molar ratio showed proton conductivity in the order of 10-1 S.cm-1 (5% RH) and ~1.6×10-2 S.cm-1 (anhydrous condition) at 200°C. These proton conductivities were mainly attributed to excess acid locked into the functionalized TiP structure, thus forming ionisable protons. |
en |
dc.publisher |
World Scientific Publishing |
en |
dc.relation.ispartofseries |
International Journal of Modern Physics B |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from: http://www.sherpa.ac.uk/romeo/issn/0217-9792/ |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.title |
Characterization of titanium phosphate as electrolytes in fuel cells |
en |
dc.type |
Journal Article |
en |
dc.identifier.doi |
10.1142/S0217979206041008 |
en |
pubs.issue |
25-27 |
en |
pubs.begin-page |
4147 |
en |
pubs.volume |
20 |
en |
dc.rights.holder |
Copyright: World Scientific Publishing |
en |
pubs.end-page |
4152 |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
Article |
en |
pubs.elements-id |
297048 |
en |
dc.identifier.eissn |
1793-6578 |
en |
pubs.record-created-at-source-date |
2012-02-17 |
en |