Please use this identifier to cite or link to this item: https://doi.org/10.1021/jp020151j
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dc.titleNanosized nickel(or cobalt)/graphite composites for hydrogen storage
dc.contributor.authorZhong, Z.Y.
dc.contributor.authorXiong, Z.T.
dc.contributor.authorSun, L.F.
dc.contributor.authorLuo, J.Z.
dc.contributor.authorChen, P.
dc.contributor.authorWu, X.
dc.contributor.authorLin, J.
dc.contributor.authorTan, K.L.
dc.date.accessioned2014-10-16T09:33:35Z
dc.date.available2014-10-16T09:33:35Z
dc.date.issued2002-09-19
dc.identifier.citationZhong, Z.Y., Xiong, Z.T., Sun, L.F., Luo, J.Z., Chen, P., Wu, X., Lin, J., Tan, K.L. (2002-09-19). Nanosized nickel(or cobalt)/graphite composites for hydrogen storage. Journal of Physical Chemistry B 106 (37) : 9507-9513. ScholarBank@NUS Repository. https://doi.org/10.1021/jp020151j
dc.identifier.issn10895647
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/97295
dc.description.abstractTo seek new potential materials for hydrogen storage, an arc-discharge method was employed to prepare nanosized nickel(or cobalt)/graphite composites, in which the nickel (or cobalt) particles were highly dispersed in a carbon matrix with particle size between 20 and 70 nm (or 5-20 nm). Quantitative TPD measurements showed that at about 500 °C and 30-50 atm these nanosized composites could uptake up to 2.8 wt % H2, which can be released at 500 °C and 1 atm. The addition of Ni (or Co) in C was found to largely enhance the H2 adsorption, with the optimal amount of Ni being 20 wt %. In-situ FTIR showed that hydrogen was dissociatively adsorbed only in the presence of a transition metal and bonded to carbon atoms forming C-H bond. The hydrogen adsorption/desorption could be recycled. However, the capacity decreased to 1.6 wt % after 5 cycles. TEM, XPS, and BET surface-area and pore-volume measurements revealed that some of the transition metal particles migrated out from the carbon matrix and agglomerated after the H2 adsorption/desorption cycles, which may reduce the transition metal-carbon synergism and thus the H2 storage capacity. Under low temperatures below -120 °C and moderate pressures above 6 atm hydrogen storage by these Ni(or Co)/C composites could be detected. Storage capacity up to 2.7 wt % for Ni/C was measured by PCI at 77 K and 70 atm.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1021/jp020151j
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentPHYSICS
dc.description.doi10.1021/jp020151j
dc.description.sourcetitleJournal of Physical Chemistry B
dc.description.volume106
dc.description.issue37
dc.description.page9507-9513
dc.description.codenJPCBF
dc.identifier.isiut000178010700005
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