Micro-channel development and hydrogen adsorption properties in templated microporous carbons containing platinum nanoparticles
dc.contributor.author | Yang, Y. | |
dc.contributor.author | Brown, C. | |
dc.contributor.author | Zhao, C. | |
dc.contributor.author | Chaffee, A. | |
dc.contributor.author | Nick, B. | |
dc.contributor.author | Zhao, D. | |
dc.contributor.author | Webley, P. | |
dc.contributor.author | Schalch, J. | |
dc.contributor.author | Simmons, J. | |
dc.contributor.author | Liu, Y. | |
dc.contributor.author | her, J. | |
dc.contributor.author | Buckley, Craig | |
dc.contributor.author | Sheppard, Drew | |
dc.date.accessioned | 2017-01-30T13:24:05Z | |
dc.date.available | 2017-01-30T13:24:05Z | |
dc.date.created | 2016-09-22T12:04:54Z | |
dc.date.issued | 2011 | |
dc.identifier.citation | Yang, Y. and Brown, C. and Zhao, C. and Chaffee, A. and Nick, B. and Zhao, D. and Webley, P. et al. 2011. Micro-channel development and hydrogen adsorption properties in templated microporous carbons containing platinum nanoparticles. Carbon. 49 (4): pp. 1305-1317. | |
dc.identifier.uri | http://hdl.handle.net/20.500.11937/31207 | |
dc.identifier.doi | 10.1016/j.carbon.2010.11.050 | |
dc.description.abstract |
Ordered microporous carbons containing dispersed platinum nanoparticles were fabricated and chosen as suitable models to investigate micro-structure development and hydrogen transport properties of zeolite-templated carbons. X-ray photoelectron spectroscopy analysis revealed that the enhanced heat of adsorption is related to the narrow micro-channels templated from the zeolite and the presence of certain Csingle bondO groups on the carbon. The lack of a well-defined and intense rotational transition line and the persistent broad H2 recoil spectrum in neutron scattering results suggests a distribution of binding sites. Most interestingly, hydrogen diffusion occurs on two time scales, consisting of a fast liquid-like jump diffusion on the timescale of picoseconds along with an even faster bulk-like diffusion. The liquid-like motion is characterized by a diffusion constant of (2.1 ± 0.3) × 10−8 m2/s with an activation energy of ca. 77 K; both values indicate somewhat lower mobility than similar dynamics of H2 on nanotubes, activated carbon XC-72, or Grafoil, yet greater mobility than that of bulk liquid. These unusual characteristics for hydrogen in carbons are believed to arise from the network of narrow pores in this zeolite-templated image of the zeolite. In fact, the diffusion constants of the templated carbons are extremely similar to those measured for zeolite 13X. | |
dc.publisher | Pergamon | |
dc.title | Micro-channel development and hydrogen adsorption properties in templated microporous carbons containing platinum nanoparticles | |
dc.type | Journal Article | |
dcterms.source.volume | 49 | |
dcterms.source.startPage | 1305 | |
dcterms.source.endPage | 1317 | |
dcterms.source.issn | 00086223 | |
dcterms.source.title | Carbon | |
curtin.department | Department of Physics and Astronomy | |
curtin.accessStatus | Fulltext not available |
Files in this item
Files | Size | Format | View |
---|---|---|---|
There are no files associated with this item. |