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Article: Hydrogen spillover in Pt-single-walled carbon nanotube composites: Formation of stable C-H bonds

TitleHydrogen spillover in Pt-single-walled carbon nanotube composites: Formation of stable C-H bonds
Authors
Issue Date2011
Citation
Journal of the American Chemical Society, 2011, v. 133, n. 14, p. 5580-5586 How to Cite?
AbstractUsing in situ electrical conductivity and ex situ X-ray photoelectron spectroscopy (XPS) measurements, we have examined how the hydrogen uptake of single-walled carbon nanotubes (SWNTs) is influenced by the addition of Pt nanoparticles. The conductivity of platinum-sputtered single-walled carbon nanotubes (Pt-SWNTs) during molecular hydrogen exposure decreased more rapidly than that of the corresponding pure SWNTs, which supports a hydrogenation mechanism facilitated by "spillover" of dissociated hydrogen from the Pt nanoparticles. C 1s XPS spectra indicate that the Pt-SWNTs store hydrogen by means of chemisorption, that is, covalent C-H bond formation: molecular hydrogen charging at elevated pressure (8.27 bar) and room temperature yielded Pt-SWNTs with up to 16 ± 1.5 at. % sp3-hybridized carbon atoms, which corresponds to a hydrogen-storage capacity of 1.2 wt % (excluding the weight of Pt nanoparticles). Pt-SWNTs prepared by the Langmuir-Blodgett (LB) technique exhibited the highest Pt/SWNT ratio and also the best hydrogen uptake.(Figure Presented) © 2011 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/334236
ISSN
2023 Impact Factor: 14.4
2023 SCImago Journal Rankings: 5.489
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorBhowmick, Ranadeep-
dc.contributor.authorRajasekaran, Srivats-
dc.contributor.authorFriebel, Daniel-
dc.contributor.authorBeasley, Cara-
dc.contributor.authorJiao, Liying-
dc.contributor.authorOgasawara, Hirohito-
dc.contributor.authorDai, Hongjie-
dc.contributor.authorClemens, Bruce-
dc.contributor.authorNilsson, Anders-
dc.date.accessioned2023-10-20T06:46:41Z-
dc.date.available2023-10-20T06:46:41Z-
dc.date.issued2011-
dc.identifier.citationJournal of the American Chemical Society, 2011, v. 133, n. 14, p. 5580-5586-
dc.identifier.issn0002-7863-
dc.identifier.urihttp://hdl.handle.net/10722/334236-
dc.description.abstractUsing in situ electrical conductivity and ex situ X-ray photoelectron spectroscopy (XPS) measurements, we have examined how the hydrogen uptake of single-walled carbon nanotubes (SWNTs) is influenced by the addition of Pt nanoparticles. The conductivity of platinum-sputtered single-walled carbon nanotubes (Pt-SWNTs) during molecular hydrogen exposure decreased more rapidly than that of the corresponding pure SWNTs, which supports a hydrogenation mechanism facilitated by "spillover" of dissociated hydrogen from the Pt nanoparticles. C 1s XPS spectra indicate that the Pt-SWNTs store hydrogen by means of chemisorption, that is, covalent C-H bond formation: molecular hydrogen charging at elevated pressure (8.27 bar) and room temperature yielded Pt-SWNTs with up to 16 ± 1.5 at. % sp3-hybridized carbon atoms, which corresponds to a hydrogen-storage capacity of 1.2 wt % (excluding the weight of Pt nanoparticles). Pt-SWNTs prepared by the Langmuir-Blodgett (LB) technique exhibited the highest Pt/SWNT ratio and also the best hydrogen uptake.(Figure Presented) © 2011 American Chemical Society.-
dc.languageeng-
dc.relation.ispartofJournal of the American Chemical Society-
dc.titleHydrogen spillover in Pt-single-walled carbon nanotube composites: Formation of stable C-H bonds-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/ja200403m-
dc.identifier.scopuseid_2-s2.0-79953709414-
dc.identifier.volume133-
dc.identifier.issue14-
dc.identifier.spage5580-
dc.identifier.epage5586-
dc.identifier.eissn1520-5126-
dc.identifier.isiWOS:000289829100060-

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